diff --git a/ports/cc3200/mods/modmachine.c b/ports/cc3200/mods/modmachine.c
index 89800810c7..ee76d6e516 100644
--- a/ports/cc3200/mods/modmachine.c
+++ b/ports/cc3200/mods/modmachine.c
@@ -209,7 +209,7 @@ STATIC const mp_rom_map_elem_t machine_module_globals_table[] = {
 
 STATIC MP_DEFINE_CONST_DICT(machine_module_globals, machine_module_globals_table);
 
-const mp_obj_module_t machine_module = {
+const mp_obj_module_t mp_module_machine = {
     .base = { &mp_type_module },
     .globals = (mp_obj_dict_t*)&machine_module_globals,
 };
diff --git a/ports/cc3200/mpconfigport.h b/ports/cc3200/mpconfigport.h
index 345b64fe40..28192e9b3e 100644
--- a/ports/cc3200/mpconfigport.h
+++ b/ports/cc3200/mpconfigport.h
@@ -145,7 +145,6 @@
     { MP_ROM_QSTR(MP_QSTR_open),  MP_ROM_PTR(&mp_builtin_open_obj) },   \
 
 // extra built in modules to add to the list of known ones
-extern const struct _mp_obj_module_t machine_module;
 extern const struct _mp_obj_module_t wipy_module;
 extern const struct _mp_obj_module_t mp_module_ure;
 extern const struct _mp_obj_module_t mp_module_ujson;
@@ -158,7 +157,6 @@ extern const struct _mp_obj_module_t mp_module_ubinascii;
 extern const struct _mp_obj_module_t mp_module_ussl;
 
 #define MICROPY_PORT_BUILTIN_MODULES \
-    { MP_ROM_QSTR(MP_QSTR_umachine),    MP_ROM_PTR(&machine_module) },      \
     { MP_ROM_QSTR(MP_QSTR_wipy),        MP_ROM_PTR(&wipy_module) },         \
     { MP_ROM_QSTR(MP_QSTR_uos),         MP_ROM_PTR(&mp_module_uos) },       \
     { MP_ROM_QSTR(MP_QSTR_utime),       MP_ROM_PTR(&mp_module_utime) },     \
@@ -170,7 +168,7 @@ extern const struct _mp_obj_module_t mp_module_ussl;
 
 // extra constants
 #define MICROPY_PORT_CONSTANTS \
-    { MP_ROM_QSTR(MP_QSTR_umachine),     MP_ROM_PTR(&machine_module) },      \
+    { MP_ROM_QSTR(MP_QSTR_umachine),     MP_ROM_PTR(&mp_module_machine) },  \
 
 // vm state and root pointers for the gc
 #define MP_STATE_PORT MP_STATE_VM
diff --git a/ports/esp32/mpconfigport.h b/ports/esp32/mpconfigport.h
index dc6bc2e53b..c457a5743b 100644
--- a/ports/esp32/mpconfigport.h
+++ b/ports/esp32/mpconfigport.h
@@ -224,7 +224,6 @@ extern const struct _mp_obj_module_t esp32_module;
 extern const struct _mp_obj_module_t utime_module;
 extern const struct _mp_obj_module_t uos_module;
 extern const struct _mp_obj_module_t mp_module_usocket;
-extern const struct _mp_obj_module_t mp_module_machine;
 extern const struct _mp_obj_module_t mp_module_network;
 extern const struct _mp_obj_module_t mp_module_onewire;
 
@@ -234,7 +233,6 @@ extern const struct _mp_obj_module_t mp_module_onewire;
     { MP_OBJ_NEW_QSTR(MP_QSTR_utime), (mp_obj_t)&utime_module }, \
     { MP_OBJ_NEW_QSTR(MP_QSTR_uos), (mp_obj_t)&uos_module }, \
     { MP_OBJ_NEW_QSTR(MP_QSTR_usocket), (mp_obj_t)&mp_module_usocket }, \
-    { MP_OBJ_NEW_QSTR(MP_QSTR_machine), (mp_obj_t)&mp_module_machine }, \
     { MP_OBJ_NEW_QSTR(MP_QSTR_network), (mp_obj_t)&mp_module_network }, \
     { MP_OBJ_NEW_QSTR(MP_QSTR__onewire), (mp_obj_t)&mp_module_onewire }, \
 
diff --git a/ports/esp8266/mpconfigport.h b/ports/esp8266/mpconfigport.h
index 7d6d0a34c3..49c53a4671 100644
--- a/ports/esp8266/mpconfigport.h
+++ b/ports/esp8266/mpconfigport.h
@@ -174,7 +174,6 @@ extern const struct _mp_obj_module_t network_module;
 extern const struct _mp_obj_module_t utime_module;
 extern const struct _mp_obj_module_t uos_module;
 extern const struct _mp_obj_module_t mp_module_lwip;
-extern const struct _mp_obj_module_t mp_module_machine;
 extern const struct _mp_obj_module_t mp_module_onewire;
 
 #define MICROPY_PORT_BUILTIN_MODULES \
@@ -183,7 +182,6 @@ extern const struct _mp_obj_module_t mp_module_onewire;
     { MP_ROM_QSTR(MP_QSTR_network), MP_ROM_PTR(&network_module) }, \
     { MP_ROM_QSTR(MP_QSTR_utime), MP_ROM_PTR(&utime_module) }, \
     { MP_ROM_QSTR(MP_QSTR_uos), MP_ROM_PTR(&uos_module) }, \
-    { MP_ROM_QSTR(MP_QSTR_machine), MP_ROM_PTR(&mp_module_machine) }, \
     { MP_ROM_QSTR(MP_QSTR__onewire), MP_ROM_PTR(&mp_module_onewire) }, \
 
 #define MP_STATE_PORT MP_STATE_VM
diff --git a/ports/mimxrt/mpconfigport.h b/ports/mimxrt/mpconfigport.h
index e650579e69..4462a18a61 100644
--- a/ports/mimxrt/mpconfigport.h
+++ b/ports/mimxrt/mpconfigport.h
@@ -217,7 +217,6 @@ static inline void restore_irq_pri(uint32_t basepri) {
 #define MICROPY_PORT_BUILTINS \
     { MP_ROM_QSTR(MP_QSTR_open), MP_ROM_PTR(&mp_builtin_open_obj) },
 
-extern const struct _mp_obj_module_t mp_module_machine;
 extern const struct _mp_obj_module_t mp_module_mimxrt;
 extern const struct _mp_obj_module_t mp_module_onewire;
 extern const struct _mp_obj_module_t mp_module_uos;
@@ -256,7 +255,6 @@ extern const struct _mp_obj_type_t network_lan_type;
 #endif
 
 #define MICROPY_PORT_BUILTIN_MODULES \
-    { MP_ROM_QSTR(MP_QSTR_machine), MP_ROM_PTR(&mp_module_machine) }, \
     { MP_ROM_QSTR(MP_QSTR_mimxrt), (mp_obj_t)&mp_module_mimxrt }, \
     { MP_ROM_QSTR(MP_QSTR_uos), MP_ROM_PTR(&mp_module_uos) }, \
     { MP_ROM_QSTR(MP_QSTR_utime), MP_ROM_PTR(&mp_module_utime) }, \
diff --git a/ports/nrf/modules/machine/modmachine.c b/ports/nrf/modules/machine/modmachine.c
index fb3267e0db..3d4cda8e45 100644
--- a/ports/nrf/modules/machine/modmachine.c
+++ b/ports/nrf/modules/machine/modmachine.c
@@ -244,7 +244,7 @@ STATIC const mp_rom_map_elem_t machine_module_globals_table[] = {
 
 STATIC MP_DEFINE_CONST_DICT(machine_module_globals, machine_module_globals_table);
 
-const mp_obj_module_t machine_module = {
+const mp_obj_module_t mp_module_machine = {
     .base = { &mp_type_module },
     .globals = (mp_obj_dict_t*)&machine_module_globals,
 };
diff --git a/ports/nrf/mpconfigport.h b/ports/nrf/mpconfigport.h
index 3ffb092c61..7a6e282e86 100644
--- a/ports/nrf/mpconfigport.h
+++ b/ports/nrf/mpconfigport.h
@@ -220,7 +220,6 @@ typedef long mp_off_t;
 
 // extra built in modules to add to the list of known ones
 extern const struct _mp_obj_module_t board_module;
-extern const struct _mp_obj_module_t machine_module;
 extern const struct _mp_obj_module_t nrf_module;
 extern const struct _mp_obj_module_t mp_module_utime;
 extern const struct _mp_obj_module_t mp_module_uos;
@@ -263,7 +262,6 @@ extern const struct _mp_obj_module_t ble_module;
 
 #define MICROPY_PORT_BUILTIN_MODULES \
     { MP_ROM_QSTR(MP_QSTR_board), MP_ROM_PTR(&board_module) }, \
-    { MP_ROM_QSTR(MP_QSTR_machine), MP_ROM_PTR(&machine_module) }, \
     { MP_ROM_QSTR(MP_QSTR_utime), MP_ROM_PTR(&mp_module_utime) }, \
     { MP_ROM_QSTR(MP_QSTR_time), MP_ROM_PTR(&mp_module_utime) }, \
     { MP_ROM_QSTR(MP_QSTR_uos), MP_ROM_PTR(&mp_module_uos) }, \
@@ -278,7 +276,6 @@ extern const struct _mp_obj_module_t ble_module;
 extern const struct _mp_obj_module_t ble_module;
 #define MICROPY_PORT_BUILTIN_MODULES \
     { MP_ROM_QSTR(MP_QSTR_board), MP_ROM_PTR(&board_module) }, \
-    { MP_ROM_QSTR(MP_QSTR_machine), MP_ROM_PTR(&machine_module) }, \
     { MP_ROM_QSTR(MP_QSTR_utime), MP_ROM_PTR(&mp_module_utime) }, \
     { MP_ROM_QSTR(MP_QSTR_uos), MP_ROM_PTR(&mp_module_uos) }, \
     MUSIC_MODULE \
@@ -296,7 +293,7 @@ extern const struct _mp_obj_module_t ble_module;
 // extra constants
 #define MICROPY_PORT_CONSTANTS \
     { MP_ROM_QSTR(MP_QSTR_board), MP_ROM_PTR(&board_module) }, \
-    { MP_ROM_QSTR(MP_QSTR_machine), MP_ROM_PTR(&machine_module) }, \
+    { MP_ROM_QSTR(MP_QSTR_machine), MP_ROM_PTR(&mp_module_machine) }, \
     BLE_MODULE \
 
 #define MP_STATE_PORT MP_STATE_VM
diff --git a/ports/qemu-arm/mpconfigport.h b/ports/qemu-arm/mpconfigport.h
index 270995979c..6bfea74ea0 100644
--- a/ports/qemu-arm/mpconfigport.h
+++ b/ports/qemu-arm/mpconfigport.h
@@ -68,7 +68,6 @@ extern const struct _mp_obj_module_t mp_module_uos;
 
 #define MICROPY_PORT_BUILTIN_MODULES \
     { MP_ROM_QSTR(MP_QSTR_uos), MP_ROM_PTR(&mp_module_uos) }, \
-    { MP_ROM_QSTR(MP_QSTR_umachine), MP_ROM_PTR(&mp_module_machine) }, \
 
 // We need to provide a declaration/definition of alloca()
 #include <alloca.h>
diff --git a/ports/rp2/mpconfigport.h b/ports/rp2/mpconfigport.h
index 63d9818e31..1ff9d5b511 100644
--- a/ports/rp2/mpconfigport.h
+++ b/ports/rp2/mpconfigport.h
@@ -121,7 +121,6 @@
 #define MICROPY_PORT_BUILTINS \
     { MP_ROM_QSTR(MP_QSTR_open), MP_ROM_PTR(&mp_builtin_open_obj) },
 
-extern const struct _mp_obj_module_t mp_module_machine;
 extern const struct _mp_obj_module_t mp_module_network;
 extern const struct _mp_obj_module_t mp_module_onewire;
 extern const struct _mp_obj_module_t mp_module_rp2;
@@ -171,7 +170,6 @@ extern const struct _mod_network_nic_type_t mod_network_nic_type_nina;
 #endif
 
 #define MICROPY_PORT_BUILTIN_MODULES \
-    { MP_OBJ_NEW_QSTR(MP_QSTR_machine), (mp_obj_t)&mp_module_machine }, \
     { MP_OBJ_NEW_QSTR(MP_QSTR__onewire), (mp_obj_t)&mp_module_onewire }, \
     { MP_OBJ_NEW_QSTR(MP_QSTR__rp2), (mp_obj_t)&mp_module_rp2 }, \
     { MP_ROM_QSTR(MP_QSTR_uos), MP_ROM_PTR(&mp_module_uos) }, \
diff --git a/ports/samd/mpconfigport.h b/ports/samd/mpconfigport.h
index 645f16b3f7..54018f111e 100644
--- a/ports/samd/mpconfigport.h
+++ b/ports/samd/mpconfigport.h
@@ -108,12 +108,10 @@
 #define MICROPY_PORT_BUILTINS \
     { MP_ROM_QSTR(MP_QSTR_open), MP_ROM_PTR(&mp_builtin_open_obj) },
 
-extern const struct _mp_obj_module_t mp_module_machine;
 extern const struct _mp_obj_module_t mp_module_samd;
 extern const struct _mp_obj_module_t mp_module_utime;
 
 #define MICROPY_PORT_BUILTIN_MODULES \
-    { MP_ROM_QSTR(MP_QSTR_machine), MP_ROM_PTR(&mp_module_machine) }, \
     { MP_ROM_QSTR(MP_QSTR_samd), MP_ROM_PTR(&mp_module_samd) }, \
     { MP_ROM_QSTR(MP_QSTR_utime), MP_ROM_PTR(&mp_module_utime) }, \
 
diff --git a/ports/stm32/modmachine.c b/ports/stm32/modmachine.c
index 9b215c75cd..f9026bc370 100644
--- a/ports/stm32/modmachine.c
+++ b/ports/stm32/modmachine.c
@@ -464,7 +464,7 @@ STATIC const mp_rom_map_elem_t machine_module_globals_table[] = {
 
 STATIC MP_DEFINE_CONST_DICT(machine_module_globals, machine_module_globals_table);
 
-const mp_obj_module_t machine_module = {
+const mp_obj_module_t mp_module_machine = {
     .base = { &mp_type_module },
     .globals = (mp_obj_dict_t *)&machine_module_globals,
 };
diff --git a/ports/stm32/mpconfigport.h b/ports/stm32/mpconfigport.h
index 6bca5dfd92..3cca8f1925 100644
--- a/ports/stm32/mpconfigport.h
+++ b/ports/stm32/mpconfigport.h
@@ -169,7 +169,6 @@
     { MP_ROM_QSTR(MP_QSTR_open), MP_ROM_PTR(&mp_builtin_open_obj) },
 
 // extra built in modules to add to the list of known ones
-extern const struct _mp_obj_module_t machine_module;
 extern const struct _mp_obj_module_t pyb_module;
 extern const struct _mp_obj_module_t stm_module;
 extern const struct _mp_obj_module_t mp_module_ubinascii;
@@ -197,10 +196,10 @@ extern const struct _mp_obj_module_t mp_module_onewire;
 #endif
 
 #if MICROPY_PY_MACHINE
-#define MACHINE_BUILTIN_MODULE              { MP_ROM_QSTR(MP_QSTR_umachine), MP_ROM_PTR(&machine_module) },
-#define MACHINE_BUILTIN_MODULE_CONSTANTS    { MP_ROM_QSTR(MP_QSTR_machine), MP_ROM_PTR(&machine_module) },
+#define MACHINE_BUILTIN_MODULE_CONSTANTS \
+    { MP_ROM_QSTR(MP_QSTR_umachine), MP_ROM_PTR(&mp_module_machine) }, \
+    { MP_ROM_QSTR(MP_QSTR_machine), MP_ROM_PTR(&mp_module_machine) },
 #else
-#define MACHINE_BUILTIN_MODULE
 #define MACHINE_BUILTIN_MODULE_CONSTANTS
 #endif
 
@@ -272,7 +271,6 @@ extern const struct _mod_network_nic_type_t mod_network_nic_type_cc3k;
 #endif
 
 #define MICROPY_PORT_BUILTIN_MODULES \
-    MACHINE_BUILTIN_MODULE \
     PYB_BUILTIN_MODULE \
     STM_BUILTIN_MODULE \
     UOS_BUILTIN_MODULE \
@@ -283,7 +281,6 @@ extern const struct _mod_network_nic_type_t mod_network_nic_type_cc3k;
 
 // extra constants
 #define MICROPY_PORT_CONSTANTS \
-    MACHINE_BUILTIN_MODULE \
     MACHINE_BUILTIN_MODULE_CONSTANTS \
     PYB_BUILTIN_MODULE \
     STM_BUILTIN_MODULE \
diff --git a/ports/unix/mpconfigport.h b/ports/unix/mpconfigport.h
index 658cb680f1..d54d0b3ef3 100644
--- a/ports/unix/mpconfigport.h
+++ b/ports/unix/mpconfigport.h
@@ -204,7 +204,6 @@ extern const struct _mp_print_t mp_stderr_print;
 #define mp_type_fileio mp_type_vfs_posix_fileio
 #define mp_type_textio mp_type_vfs_posix_textio
 
-extern const struct _mp_obj_module_t mp_module_machine;
 extern const struct _mp_obj_module_t mp_module_os;
 extern const struct _mp_obj_module_t mp_module_uos_vfs;
 extern const struct _mp_obj_module_t mp_module_uselect;
@@ -255,7 +254,6 @@ extern const struct _mp_obj_module_t mp_module_jni;
     MICROPY_PY_JNI_DEF \
     MICROPY_PY_UTIME_DEF \
     MICROPY_PY_SOCKET_DEF \
-    { MP_ROM_QSTR(MP_QSTR_umachine), MP_ROM_PTR(&mp_module_machine) }, \
     MICROPY_PY_UOS_DEF \
     MICROPY_PY_USELECT_DEF \
     MICROPY_PY_TERMIOS_DEF \
diff --git a/ports/windows/mpconfigport.h b/ports/windows/mpconfigport.h
index 88746744ae..d589dac7a7 100644
--- a/ports/windows/mpconfigport.h
+++ b/ports/windows/mpconfigport.h
@@ -207,7 +207,6 @@ extern const struct _mp_obj_module_t mp_module_os;
 extern const struct _mp_obj_module_t mp_module_time;
 #define MICROPY_PORT_BUILTIN_MODULES \
     { MP_ROM_QSTR(MP_QSTR_utime), MP_ROM_PTR(&mp_module_time) }, \
-    { MP_ROM_QSTR(MP_QSTR_umachine), MP_ROM_PTR(&mp_module_machine) }, \
     { MP_ROM_QSTR(MP_QSTR_uos), MP_ROM_PTR(&mp_module_os) }, \
 
 #if MICROPY_USE_READLINE == 1
diff --git a/ports/zephyr/mpconfigport.h b/ports/zephyr/mpconfigport.h
index 501c39a1bb..b8e25faefd 100644
--- a/ports/zephyr/mpconfigport.h
+++ b/ports/zephyr/mpconfigport.h
@@ -138,7 +138,6 @@ typedef long mp_off_t;
     void *machine_pin_irq_list; /* Linked list of pin irq objects */ \
     struct _mp_bluetooth_zephyr_root_pointers_t *bluetooth_zephyr_root_pointers;
 
-extern const struct _mp_obj_module_t mp_module_machine;
 extern const struct _mp_obj_module_t mp_module_time;
 extern const struct _mp_obj_module_t mp_module_uos;
 extern const struct _mp_obj_module_t mp_module_usocket;
@@ -176,7 +175,6 @@ extern const struct _mp_obj_module_t mp_module_zsensor;
 #endif
 
 #define MICROPY_PORT_BUILTIN_MODULES \
-    { MP_ROM_QSTR(MP_QSTR_machine), MP_ROM_PTR(&mp_module_machine) }, \
     MICROPY_PY_UOS_DEF \
     MICROPY_PY_USOCKET_DEF \
     MICROPY_PY_UTIME_DEF \
diff --git a/py/objmodule.c b/py/objmodule.c
index 6b06740e4d..9be4bad92c 100644
--- a/py/objmodule.c
+++ b/py/objmodule.c
@@ -219,6 +219,9 @@ STATIC const mp_rom_map_elem_t mp_builtin_module_table[] = {
     #if MICROPY_PY_LWIP
     { MP_ROM_QSTR(MP_QSTR_lwip), MP_ROM_PTR(&mp_module_lwip) },
     #endif
+    #if MICROPY_PY_MACHINE
+    { MP_ROM_QSTR(MP_QSTR_umachine), MP_ROM_PTR(&mp_module_machine) },
+    #endif
     #if MICROPY_PY_UWEBSOCKET
     { MP_ROM_QSTR(MP_QSTR_uwebsocket), MP_ROM_PTR(&mp_module_uwebsocket) },
     #endif