diff --git a/src/undo.c b/src/undo.c
index 8d23e77..efbd4cc 100644
--- a/src/undo.c
+++ b/src/undo.c
@@ -1387,7 +1387,7 @@
     if (time(NULL) - tt >= 100)
     {
 	curtime = localtime(&tt);
-	(void)strftime((char *)buf, buflen, "%T", curtime);
+	(void)strftime((char *)buf, buflen, "%H:%M:%S", curtime);
     }
     else
 #endif