diff --git a/cc3200/misc/mpcallback.c b/cc3200/misc/mpcallback.c
index ff04e713f8..2dfd5e006a 100644
--- a/cc3200/misc/mpcallback.c
+++ b/cc3200/misc/mpcallback.c
@@ -66,7 +66,7 @@ mp_obj_t mpcallback_new (mp_obj_t parent, mp_obj_t handler, const mp_cb_methods_
     self->methods = (mp_cb_methods_t *)methods;
     self->isenabled = enable;
     // remove it in case it was already registered
-    mpcallback_remove(self->parent);
+    mpcallback_remove(parent);
     mp_obj_list_append(&MP_STATE_PORT(mpcallback_obj_list), self);
     return self;
 }
diff --git a/cc3200/mods/pybsleep.c b/cc3200/mods/pybsleep.c
index abfadd996c..c04b497974 100644
--- a/cc3200/mods/pybsleep.c
+++ b/cc3200/mods/pybsleep.c
@@ -213,7 +213,7 @@ void pybsleep_add (const mp_obj_t obj, WakeUpCB_t wakeup) {
     sleep_obj->obj = obj;
     sleep_obj->wakeup = wakeup;
     // remove it in case it was already registered
-    pybsleep_remove (sleep_obj);
+    pybsleep_remove (obj);
     mp_obj_list_append(&MP_STATE_PORT(pybsleep_obj_list), sleep_obj);
 }