diff --git a/src/gcal-view.c b/src/gcal-view.c
index 78f3ee7a..00134bcd 100644
--- a/src/gcal-view.c
+++ b/src/gcal-view.c
@@ -180,5 +180,7 @@ gcal_view_create_event_on_current_unit (GcalView *view)
 {
   g_return_if_fail (GCAL_IS_VIEW (view));
 
+  g_return_if_fail (GCAL_VIEW_GET_INTERFACE (view)->create_event_on_current_unit);
+
   GCAL_VIEW_GET_INTERFACE (view)->create_event_on_current_unit (view);
 }