diff --git a/examples/embedding/mpconfigport_minimal.h b/examples/embedding/mpconfigport_minimal.h
index 91b194bc7b..02089c1a62 100644
--- a/examples/embedding/mpconfigport_minimal.h
+++ b/examples/embedding/mpconfigport_minimal.h
@@ -69,7 +69,6 @@
 #define MICROPY_PY_MATH             (0)
 #define MICROPY_PY_CMATH            (0)
 #define MICROPY_PY_IO               (0)
-#define MICROPY_PY_IO_FILEIO        (0)
 #define MICROPY_PY_STRUCT           (0)
 #define MICROPY_PY_SYS              (1)
 #define MICROPY_PY_SYS_EXIT         (0)
diff --git a/extmod/vfs_fat_file.c b/extmod/vfs_fat_file.c
index ebf36fc397..874f10c500 100644
--- a/extmod/vfs_fat_file.c
+++ b/extmod/vfs_fat_file.c
@@ -170,7 +170,6 @@ STATIC const mp_rom_map_elem_t vfs_fat_rawfile_locals_dict_table[] = {
 
 STATIC MP_DEFINE_CONST_DICT(vfs_fat_rawfile_locals_dict, vfs_fat_rawfile_locals_dict_table);
 
-#if MICROPY_PY_IO_FILEIO
 STATIC const mp_stream_p_t vfs_fat_fileio_stream_p = {
     .read = file_obj_read,
     .write = file_obj_write,
@@ -186,7 +185,6 @@ const mp_obj_type_t mp_type_vfs_fat_fileio = {
     .protocol = &vfs_fat_fileio_stream_p,
     .locals_dict = (mp_obj_dict_t *)&vfs_fat_rawfile_locals_dict,
 };
-#endif
 
 STATIC const mp_stream_p_t vfs_fat_textio_stream_p = {
     .read = file_obj_read,
@@ -230,11 +228,9 @@ STATIC mp_obj_t fat_vfs_open(mp_obj_t self_in, mp_obj_t path_in, mp_obj_t mode_i
             case '+':
                 mode |= FA_READ | FA_WRITE;
                 break;
-            #if MICROPY_PY_IO_FILEIO
             case 'b':
                 type = &mp_type_vfs_fat_fileio;
                 break;
-            #endif
             case 't':
                 type = &mp_type_vfs_fat_textio;
                 break;
diff --git a/extmod/vfs_lfsx_file.c b/extmod/vfs_lfsx_file.c
index bc1a37b90b..124361feb9 100644
--- a/extmod/vfs_lfsx_file.c
+++ b/extmod/vfs_lfsx_file.c
@@ -68,11 +68,9 @@ mp_obj_t MP_VFS_LFSx(file_open)(mp_obj_t self_in, mp_obj_t path_in, mp_obj_t mod
             case '+':
                 flags |= LFSx_MACRO(_O_RDWR);
                 break;
-            #if MICROPY_PY_IO_FILEIO
             case 'b':
                 type = &MP_TYPE_VFS_LFSx_(_fileio);
                 break;
-            #endif
             case 't':
                 type = &MP_TYPE_VFS_LFSx_(_textio);
                 break;
@@ -216,7 +214,6 @@ STATIC const mp_rom_map_elem_t MP_VFS_LFSx(file_locals_dict_table)[] = {
 };
 STATIC MP_DEFINE_CONST_DICT(MP_VFS_LFSx(file_locals_dict), MP_VFS_LFSx(file_locals_dict_table));
 
-#if MICROPY_PY_IO_FILEIO
 STATIC const mp_stream_p_t MP_VFS_LFSx(fileio_stream_p) = {
     .read = MP_VFS_LFSx(file_read),
     .write = MP_VFS_LFSx(file_write),
@@ -232,7 +229,6 @@ const mp_obj_type_t MP_TYPE_VFS_LFSx_(_fileio) = {
     .protocol = &MP_VFS_LFSx(fileio_stream_p),
     .locals_dict = (mp_obj_dict_t *)&MP_VFS_LFSx(file_locals_dict),
 };
-#endif
 
 STATIC const mp_stream_p_t MP_VFS_LFSx(textio_stream_p) = {
     .read = MP_VFS_LFSx(file_read),
diff --git a/extmod/vfs_posix_file.c b/extmod/vfs_posix_file.c
index a758db14c3..c550842cd4 100644
--- a/extmod/vfs_posix_file.c
+++ b/extmod/vfs_posix_file.c
@@ -83,15 +83,12 @@ mp_obj_t mp_vfs_posix_file_open(const mp_obj_type_t *type, mp_obj_t file_in, mp_
             case '+':
                 mode_rw = O_RDWR;
                 break;
-                #if MICROPY_PY_IO_FILEIO
-            // If we don't have io.FileIO, then files are in text mode implicitly
             case 'b':
                 type = &mp_type_vfs_posix_fileio;
                 break;
             case 't':
                 type = &mp_type_vfs_posix_textio;
                 break;
-                #endif
         }
     }
 
@@ -246,7 +243,6 @@ STATIC const mp_rom_map_elem_t vfs_posix_rawfile_locals_dict_table[] = {
 
 STATIC MP_DEFINE_CONST_DICT(vfs_posix_rawfile_locals_dict, vfs_posix_rawfile_locals_dict_table);
 
-#if MICROPY_PY_IO_FILEIO
 STATIC const mp_stream_p_t vfs_posix_fileio_stream_p = {
     .read = vfs_posix_file_read,
     .write = vfs_posix_file_write,
@@ -262,7 +258,6 @@ const mp_obj_type_t mp_type_vfs_posix_fileio = {
     .protocol = &vfs_posix_fileio_stream_p,
     .locals_dict = (mp_obj_dict_t *)&vfs_posix_rawfile_locals_dict,
 };
-#endif
 
 STATIC const mp_stream_p_t vfs_posix_textio_stream_p = {
     .read = vfs_posix_file_read,
diff --git a/ports/cc3200/mpconfigport.h b/ports/cc3200/mpconfigport.h
index f41c1fe99d..93fc291c1a 100644
--- a/ports/cc3200/mpconfigport.h
+++ b/ports/cc3200/mpconfigport.h
@@ -105,7 +105,6 @@
 #define MICROPY_PY_SYS_STDFILES                     (1)
 #define MICROPY_PY_CMATH                            (0)
 #define MICROPY_PY_IO                               (1)
-#define MICROPY_PY_IO_FILEIO                        (1)
 #define MICROPY_PY_UERRNO                           (1)
 #define MICROPY_PY_UERRNO_ERRORCODE                 (0)
 #define MICROPY_PY_THREAD                           (1)
diff --git a/ports/esp8266/mpconfigport.h b/ports/esp8266/mpconfigport.h
index 9ff6a34ffd..ded56663b3 100644
--- a/ports/esp8266/mpconfigport.h
+++ b/ports/esp8266/mpconfigport.h
@@ -35,7 +35,6 @@
 #define MICROPY_PY_MATH_SPECIAL_FUNCTIONS       (0)
 #define MICROPY_PY_MATH_FACTORIAL               (0)
 #define MICROPY_PY_MATH_ISCLOSE                 (0)
-#define MICROPY_PY_IO_FILEIO                    (MICROPY_VFS)
 #define MICROPY_PY_SYS_PS1_PS2                  (0)
 #define MICROPY_PY_UBINASCII_CRC32              (0)
 #define MICROPY_PY_URANDOM_EXTRA_FUNCS          (0)
diff --git a/ports/mimxrt/mpconfigport.h b/ports/mimxrt/mpconfigport.h
index 54d649795d..8642d53ecc 100644
--- a/ports/mimxrt/mpconfigport.h
+++ b/ports/mimxrt/mpconfigport.h
@@ -101,7 +101,6 @@ uint32_t trng_random_u32(void);
 #define MICROPY_PY_MATH_ISCLOSE             (1)
 #define MICROPY_PY_CMATH                    (1)
 #define MICROPY_PY_IO_IOBASE                (1)
-#define MICROPY_PY_IO_FILEIO                (1)
 #define MICROPY_PY_SYS_MAXSIZE              (1)
 #define MICROPY_PY_SYS_PLATFORM             "mimxrt"
 #define MICROPY_PY_SYS_STDFILES             (1)
diff --git a/ports/nrf/mpconfigport.h b/ports/nrf/mpconfigport.h
index a25ca1ec27..ac238057dd 100644
--- a/ports/nrf/mpconfigport.h
+++ b/ports/nrf/mpconfigport.h
@@ -155,7 +155,6 @@
 #define MICROPY_MODULE_BUILTIN_INIT (1)
 #define MICROPY_PY_MICROPYTHON_MEM_INFO (1)
 #define MICROPY_PY_SYS_MAXSIZE      (1)
-#define MICROPY_PY_IO_FILEIO        (MICROPY_VFS_FAT || MICROPY_VFS_LFS1 || MICROPY_VFS_LFS2)
 #define MICROPY_PY_URANDOM          (1)
 #define MICROPY_PY_URANDOM_EXTRA_FUNCS (1)
 #define MICROPY_PY_UTIME_MP_HAL     (1)
diff --git a/ports/renesas-ra/mpconfigport.h b/ports/renesas-ra/mpconfigport.h
index 65b194274a..b77a3c4923 100644
--- a/ports/renesas-ra/mpconfigport.h
+++ b/ports/renesas-ra/mpconfigport.h
@@ -83,7 +83,6 @@
 #ifndef MICROPY_PY_BUILTINS_HELP_TEXT
 #define MICROPY_PY_BUILTINS_HELP_TEXT ra_help_text
 #endif
-#define MICROPY_PY_IO_FILEIO        (MICROPY_VFS_FAT || MICROPY_VFS_LFS1 || MICROPY_VFS_LFS2)
 #ifndef MICROPY_PY_SYS_PLATFORM     // let boards override it if they want
 #define MICROPY_PY_SYS_PLATFORM     "renesas-ra"
 #endif
diff --git a/ports/samd/mpconfigport.h b/ports/samd/mpconfigport.h
index c02d9316de..0b16b5e817 100644
--- a/ports/samd/mpconfigport.h
+++ b/ports/samd/mpconfigport.h
@@ -77,7 +77,6 @@
 #define MICROPY_PY_SYS_EXIT                 (1)
 #define MICROPY_PY_SYS_STDFILES             (1)
 #define MICROPY_PY_SYS_MAXSIZE              (1)
-#define MICROPY_PY_IO_FILEIO                (1)
 #define MICROPY_PY_IO                       (1)
 #define MICROPY_PY_IO_IOBASE                (1)
 
diff --git a/ports/stm32/boards/B_L072Z_LRWAN1/mpconfigboard.h b/ports/stm32/boards/B_L072Z_LRWAN1/mpconfigboard.h
index d4996e6c74..dfcca72afb 100644
--- a/ports/stm32/boards/B_L072Z_LRWAN1/mpconfigboard.h
+++ b/ports/stm32/boards/B_L072Z_LRWAN1/mpconfigboard.h
@@ -11,7 +11,6 @@
 #define MICROPY_PY_BUILTINS_COMPLEX (0)
 #define MICROPY_PY_GENERATOR_PEND_THROW (0)
 #define MICROPY_PY_MATH             (0)
-#define MICROPY_PY_IO_FILEIO        (0)
 #define MICROPY_PY_FRAMEBUF         (0)
 #define MICROPY_PY_USOCKET          (0)
 #define MICROPY_PY_NETWORK          (0)
diff --git a/ports/stm32/boards/NUCLEO_F091RC/mpconfigboard.h b/ports/stm32/boards/NUCLEO_F091RC/mpconfigboard.h
index a68b939939..d44bfb0bb6 100644
--- a/ports/stm32/boards/NUCLEO_F091RC/mpconfigboard.h
+++ b/ports/stm32/boards/NUCLEO_F091RC/mpconfigboard.h
@@ -5,7 +5,6 @@
 #define MICROPY_EMIT_INLINE_THUMB   (0)
 #define MICROPY_OPT_COMPUTED_GOTO   (0)
 #define MICROPY_PY_BUILTINS_COMPLEX (0)
-#define MICROPY_PY_IO_FILEIO        (0)
 #define MICROPY_PY_USOCKET          (0)
 #define MICROPY_PY_NETWORK          (0)
 #define MICROPY_PY_STM              (0)
diff --git a/ports/stm32/boards/NUCLEO_L073RZ/mpconfigboard.h b/ports/stm32/boards/NUCLEO_L073RZ/mpconfigboard.h
index 9af925d451..c8c809eb48 100644
--- a/ports/stm32/boards/NUCLEO_L073RZ/mpconfigboard.h
+++ b/ports/stm32/boards/NUCLEO_L073RZ/mpconfigboard.h
@@ -11,7 +11,6 @@
 #define MICROPY_PY_BUILTINS_COMPLEX (0)
 #define MICROPY_PY_GENERATOR_PEND_THROW (0)
 #define MICROPY_PY_MATH             (0)
-#define MICROPY_PY_IO_FILEIO        (0)
 #define MICROPY_PY_FRAMEBUF         (0)
 #define MICROPY_PY_USOCKET          (0)
 #define MICROPY_PY_NETWORK          (0)
diff --git a/ports/unix/mpconfigport.h b/ports/unix/mpconfigport.h
index 5545a74f57..03b8ceb1f6 100644
--- a/ports/unix/mpconfigport.h
+++ b/ports/unix/mpconfigport.h
@@ -87,7 +87,6 @@
 #define MICROPY_PY_MATH_ISCLOSE                 (MICROPY_PY_MATH_SPECIAL_FUNCTIONS)
 #define MICROPY_PY_CMATH                        (1)
 #define MICROPY_PY_IO_IOBASE                    (1)
-#define MICROPY_PY_IO_FILEIO                    (1)
 #define MICROPY_PY_SYS_MAXSIZE                  (1)
 #define MICROPY_PY_SYS_STDFILES                 (1)
 #define MICROPY_PY_UERRNO                       (1)
diff --git a/ports/unix/variants/minimal/mpconfigvariant.h b/ports/unix/variants/minimal/mpconfigvariant.h
index d6e5fc4726..2e2c1de0cc 100644
--- a/ports/unix/variants/minimal/mpconfigvariant.h
+++ b/ports/unix/variants/minimal/mpconfigvariant.h
@@ -86,7 +86,6 @@
 #define MICROPY_PY_MATH             (0)
 #define MICROPY_PY_CMATH            (0)
 #define MICROPY_PY_IO               (0)
-#define MICROPY_PY_IO_FILEIO        (0)
 #define MICROPY_PY_STRUCT           (0)
 #define MICROPY_PY_SYS              (1)
 #define MICROPY_PY_SYS_EXIT         (0)
diff --git a/ports/windows/mpconfigport.h b/ports/windows/mpconfigport.h
index 4ed9f316e7..8967242aee 100644
--- a/ports/windows/mpconfigport.h
+++ b/ports/windows/mpconfigport.h
@@ -125,7 +125,6 @@
 #define MICROPY_PY_MATH_ISCLOSE     (MICROPY_PY_MATH_SPECIAL_FUNCTIONS)
 #define MICROPY_PY_CMATH            (1)
 #define MICROPY_PY_IO_IOBASE        (1)
-#define MICROPY_PY_IO_FILEIO        (1)
 #define MICROPY_PY_GC_COLLECT_RETVAL (1)
 #ifndef MICROPY_STACKLESS
 #define MICROPY_STACKLESS           (0)
diff --git a/py/mpconfig.h b/py/mpconfig.h
index 1ed34bb6fd..d478c654d0 100644
--- a/py/mpconfig.h
+++ b/py/mpconfig.h
@@ -1321,11 +1321,6 @@ typedef double mp_float_t;
 #define MICROPY_PY_IO_IOBASE (MICROPY_CONFIG_ROM_LEVEL_AT_LEAST_EXTRA_FEATURES)
 #endif
 
-// Whether to provide "io.FileIO" class
-#ifndef MICROPY_PY_IO_FILEIO
-#define MICROPY_PY_IO_FILEIO (MICROPY_CONFIG_ROM_LEVEL_AT_LEAST_EXTRA_FEATURES)
-#endif
-
 // Whether to provide "io.BytesIO" class
 #ifndef MICROPY_PY_IO_BYTESIO
 #define MICROPY_PY_IO_BYTESIO (1)