diff --git a/py/builtin.h b/py/builtin.h
index fb11627841227..7232142b77bea 100644
--- a/py/builtin.h
+++ b/py/builtin.h
@@ -64,7 +64,13 @@ MP_DECLARE_CONST_FUN_OBJ_KW(mp_builtin_open_obj);
#endif
+// A port can provide its own import handler by defining mp_builtin___import__.
+#ifndef mp_builtin___import__
+#define mp_builtin___import__ mp_builtin___import___default
+#endif
mp_obj_t mp_builtin___import__(size_t n_args, const mp_obj_t *args);
+mp_obj_t mp_builtin___import___default(size_t n_args, const mp_obj_t *args);
+
mp_obj_t mp_micropython_mem_info(size_t n_args, const mp_obj_t *args);
MP_DECLARE_CONST_FUN_OBJ_VAR(mp_builtin___build_class___obj);
diff --git a/py/builtinimport.c b/py/builtinimport.c
index 36cdac07675e3..a578d4ad2732e 100644
--- a/py/builtinimport.c
+++ b/py/builtinimport.c
@@ -467,7 +467,7 @@ STATIC mp_obj_t process_import_at_level(qstr full_mod_name, qstr level_mod_name,
return module_obj;
}
-mp_obj_t mp_builtin___import__(size_t n_args, const mp_obj_t *args) {
+mp_obj_t mp_builtin___import___default(size_t n_args, const mp_obj_t *args) {
#if DEBUG_PRINT
DEBUG_printf("__import__:\n");
for (size_t i = 0; i < n_args; i++) {
@@ -566,7 +566,7 @@ mp_obj_t mp_builtin___import__(size_t n_args, const mp_obj_t *args) {
#else // MICROPY_ENABLE_EXTERNAL_IMPORT
-mp_obj_t mp_builtin___import__(size_t n_args, const mp_obj_t *args) {
+mp_obj_t mp_builtin___import___default(size_t n_args, const mp_obj_t *args) {
// Check that it's not a relative import
if (n_args >= 5 && MP_OBJ_SMALL_INT_VALUE(args[4]) != 0) {
mp_raise_NotImplementedError(MP_ERROR_TEXT("relative import"));
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