diff --git a/src/backends/native/meta-kms.c b/src/backends/native/meta-kms.c
index 6514f89f6..5135c4ca5 100644
--- a/src/backends/native/meta-kms.c
+++ b/src/backends/native/meta-kms.c
@@ -347,6 +347,8 @@ flush_callbacks (MetaKms *kms)
 
   meta_assert_not_in_kms_impl (kms);
 
+  g_clear_handle_id (&kms->callback_source_id, g_source_remove);
+
   for (l = kms->pending_callbacks; l; l = l->next)
     {
       MetaKmsCallbackData *callback_data = l->data;