1 files changed, 2 insertions, 0 deletions
diff --git a/history.c b/history.c
index 2993a69..8be90ec 100644
--- a/history.c
+++ b/history.c
@@ -78,6 +78,8 @@ static char *sub(char *s, char *old, char *new) {
 	char *t, *u;
 
 	t = isin(s, old);
+	if (!t)
+		return s;
 	u = newstr();
 
 	*t = '\0';