diff --git a/pbx/dundi-parser.c b/pbx/dundi-parser.c
index 8647183ca5..2ea804f1ce 100755
--- a/pbx/dundi-parser.c
+++ b/pbx/dundi-parser.c
@@ -117,6 +117,7 @@ static void dump_string(char *output, int maxlen, void *value, int len)
 
 static void dump_cbypass(char *output, int maxlen, void *value, int len)
 {
+	maxlen--;
 	strncpy(output, "Bypass Caches", maxlen);
 	output[maxlen] = '\0';
 }