diff --git a/ports/rp2/modmachine.c b/ports/rp2/modmachine.c
index 29a8dbed2c..4c428cbddf 100644
--- a/ports/rp2/modmachine.c
+++ b/ports/rp2/modmachine.c
@@ -111,7 +111,7 @@ STATIC mp_obj_t machine_freq(size_t n_args, const mp_obj_t *args) {
 STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(machine_freq_obj, 0, 1, machine_freq);
 
 STATIC mp_obj_t machine_idle(void) {
-    best_effort_wfe_or_timeout(make_timeout_time_ms(1));
+    __wfe();
     return mp_const_none;
 }
 STATIC MP_DEFINE_CONST_FUN_OBJ_0(machine_idle_obj, machine_idle);
diff --git a/ports/rp2/mpconfigport.h b/ports/rp2/mpconfigport.h
index 0a63312734..84a961db43 100644
--- a/ports/rp2/mpconfigport.h
+++ b/ports/rp2/mpconfigport.h
@@ -274,7 +274,7 @@ extern void mp_thread_end_atomic_section(uint32_t);
 #define MICROPY_EVENT_POLL_HOOK \
     do { \
         MICROPY_EVENT_POLL_HOOK_FAST; \
-        best_effort_wfe_or_timeout(make_timeout_time_ms(1)); \
+        __wfe(); \
     } while (0);
 
 #define MICROPY_MAKE_POINTER_CALLABLE(p) ((void *)((mp_uint_t)(p) | 1))