diff --git a/unix/alloc.c b/unix/alloc.c
index a0676a0aef..72b9d2a872 100644
--- a/unix/alloc.c
+++ b/unix/alloc.c
@@ -33,7 +33,7 @@
 #include "py/mpstate.h"
 #include "py/gc.h"
 
-#if MICROPY_EMIT_NATIVE
+#if MICROPY_EMIT_NATIVE || (MICROPY_PY_FFI && MICROPY_FORCE_PLAT_ALLOC_EXEC)
 
 #if defined(__OpenBSD__) || defined(__MACH__)
 #define MAP_ANONYMOUS MAP_ANON
@@ -85,4 +85,16 @@ void mp_unix_mark_exec(void) {
     }
 }
 
-#endif // MICROPY_EMIT_NATIVE
+#if MICROPY_FORCE_PLAT_ALLOC_EXEC
+void *ffi_closure_alloc(size_t size, void **code) {
+    mp_uint_t dummy;
+    mp_unix_alloc_exec(size, code, &dummy);
+    return *code;
+}
+
+void ffi_closure_free(void *ptr) {
+    // TODO
+}
+#endif
+
+#endif // MICROPY_EMIT_NATIVE || (MICROPY_PY_FFI && MICROPY_FORCE_PLAT_ALLOC_EXEC)
diff --git a/unix/mpconfigport.h b/unix/mpconfigport.h
index c824a46fd8..20ad2e26db 100644
--- a/unix/mpconfigport.h
+++ b/unix/mpconfigport.h
@@ -234,6 +234,11 @@ void mp_unix_free_exec(void *ptr, mp_uint_t size);
 void mp_unix_mark_exec(void);
 #define MP_PLAT_ALLOC_EXEC(min_size, ptr, size) mp_unix_alloc_exec(min_size, ptr, size)
 #define MP_PLAT_FREE_EXEC(ptr, size) mp_unix_free_exec(ptr, size)
+#ifndef MICROPY_FORCE_PLAT_ALLOC_EXEC
+// Use MP_PLAT_ALLOC_EXEC for any executable memory allocation, including for FFI
+// (overriding libffi own implementation)
+#define MICROPY_FORCE_PLAT_ALLOC_EXEC (1)
+#endif
 
 #if MICROPY_PY_OS_DUPTERM
 #define MP_PLAT_PRINT_STRN(str, len) mp_hal_stdout_tx_strn_cooked(str, len)