diff --git a/contrib/top/top.c b/contrib/top/top.c
index 3123a0db0ba0..94a02f2c424a 100644
--- a/contrib/top/top.c
+++ b/contrib/top/top.c
@@ -826,7 +826,7 @@ Usage: %s [-ISbinqut] [-d x] [-s x] [-o field] [-U username] [number]\n",
 				{
 				    if ((errmsg = renice_procs(tempbuf2)) != NULL)
 				    {
-					new_message(MT_standout, errmsg);
+					new_message(MT_standout, "%s", errmsg);
 					putchar('\r');
 					no_command = Yes;
 				    }