diff --git a/include/nm-macros-internal.h b/include/nm-macros-internal.h
index c4a60faa28..4d9979f3f5 100644
--- a/include/nm-macros-internal.h
+++ b/include/nm-macros-internal.h
@@ -260,7 +260,8 @@ nm_clear_g_source (guint *id)
 static inline gboolean
 nm_clear_g_signal_handler (gpointer self, guint *id)
 {
-	g_return_val_if_fail (G_IS_OBJECT (self), FALSE);
+	if (!self)
+		return FALSE;
 
 	if (id && *id) {
 		g_signal_handler_disconnect (self, *id);