--- grel.c
+++ grel.c
@@ -413,7 +413,7 @@ g_relation_print_one (gpointer tuple_key
     }
   
   g_string_append (gstring, "]");
-  g_log (g_log_domain_glib, G_LOG_LEVEL_INFO, gstring->str);
+  g_log (g_log_domain_glib, G_LOG_LEVEL_INFO, "%s", gstring->str);
   g_string_free (gstring, TRUE);
 }
 
--- testglib.c
+++ testglib.c
@@ -277,6 +277,9 @@ my_traverse (gpointer key,
   return FALSE;
 }
 
+/* This program explicitly tests for a NULL format string */
+#pragma GCC diagnostic push
+#pragma GCC diagnostic warning "-Wformat-security"
 int
 main (int   argc,
       char *argv[])
@@ -918,4 +921,5 @@ main (int   argc,
 
   return 0;
 }
+#pragma GCC diagnostic pop