diff --git a/ports/pic16bit/modpyb.c b/ports/pic16bit/modpyb.c
index a18b37700..61955509e 100644
--- a/ports/pic16bit/modpyb.c
+++ b/ports/pic16bit/modpyb.c
@@ -68,3 +68,5 @@ const mp_obj_module_t pyb_module = {
     .base = { &mp_type_module },
     .globals = (mp_obj_dict_t *)&pyb_module_globals,
 };
+
+MP_REGISTER_MODULE(MP_QSTR_pyb, pyb_module, 1);
diff --git a/ports/pic16bit/mpconfigport.h b/ports/pic16bit/mpconfigport.h
index 43300d176..52b1701ea 100644
--- a/ports/pic16bit/mpconfigport.h
+++ b/ports/pic16bit/mpconfigport.h
@@ -88,11 +88,6 @@ typedef int mp_off_t;
 #define MICROPY_PORT_BUILTINS \
     { MP_ROM_QSTR(MP_QSTR_open), MP_ROM_PTR(&mp_builtin_open_obj) },
 
-// extra builtin modules to add to the list of known ones
-extern const struct _mp_obj_module_t pyb_module;
-#define MICROPY_PORT_BUILTIN_MODULES \
-    { MP_ROM_QSTR(MP_QSTR_pyb), MP_ROM_PTR(&pyb_module) }, \
-
 #define MP_STATE_PORT MP_STATE_VM
 
 #define MICROPY_PORT_ROOT_POINTERS \