diff --git a/libnm-core/nm-setting-bond.c b/libnm-core/nm-setting-bond.c
index fb71930db..651cd4532 100644
--- a/libnm-core/nm-setting-bond.c
+++ b/libnm-core/nm-setting-bond.c
@@ -531,6 +531,8 @@ _setting_bond_validate_option (const char *name,
 	}
 
 	nm_assert_not_reached ();
+	success = FALSE;
+
 handle_error:
 	if (!success) {
 		g_set_error (error,