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-rw-r--r--networking/ping.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/networking/ping.c b/networking/ping.c
index 6945abb4a..127474ccc 100644
--- a/networking/ping.c
+++ b/networking/ping.c
@@ -179,7 +179,8 @@ int ping_main(int argc, char **argv)
len_and_sockaddr *lsa;
#if ENABLE_PING6
sa_family_t af = AF_UNSPEC;
- while (++argv[0][0] == '-') {
+
+ while ((++argv)[0] && argv[0][0] == '-') {
if (argv[0][1] == '4') {
af = AF_INET;
continue;