diff --git a/zephyr/mpconfigport.h b/zephyr/mpconfigport.h
index 2f25267795..b4677f3ed5 100644
--- a/zephyr/mpconfigport.h
+++ b/zephyr/mpconfigport.h
@@ -98,9 +98,6 @@
 
 typedef int mp_int_t; // must be pointer size
 typedef unsigned mp_uint_t; // must be pointer size
-
-typedef void *machine_ptr_t; // must be of pointer size
-typedef const void *machine_const_ptr_t; // must be of pointer size
 typedef long mp_off_t;
 
 #define MP_STATE_PORT MP_STATE_VM
diff --git a/zephyr/mpconfigport_minimal.h b/zephyr/mpconfigport_minimal.h
index 772335c0a1..f0e57d7566 100644
--- a/zephyr/mpconfigport_minimal.h
+++ b/zephyr/mpconfigport_minimal.h
@@ -80,9 +80,6 @@
 
 typedef int mp_int_t; // must be pointer size
 typedef unsigned mp_uint_t; // must be pointer size
-
-typedef void *machine_ptr_t; // must be of pointer size
-typedef const void *machine_const_ptr_t; // must be of pointer size
 typedef long mp_off_t;
 
 #define MP_STATE_PORT MP_STATE_VM