1 files changed, 1 insertions, 1 deletions
diff --git a/update.c b/update.c
index 1e3e032fd..18b13e8c9 100644
--- a/update.c
+++ b/update.c
@@ -52,7 +52,7 @@ extern int update_main(int argc, char **argv)
 
 	argc--;
 	argv++;
-	while (**argv == '-') {
+	while (argc>0 && **argv == '-') {
 		while (*++(*argv)) {
 			switch (**argv) {
 			case 'S':