diff --git a/glib/tests/gvariant.c b/glib/tests/gvariant.c
index 1a936076b..59e50e49e 100644
--- a/glib/tests/gvariant.c
+++ b/glib/tests/gvariant.c
@@ -1269,6 +1269,8 @@ static void
 flavoured_free (gpointer data,
                 gsize flavour)
 {
+  if (!data)
+    return;
   g_free (((gchar *) data) - flavour);
 }