ping: fix non-fancy ping6

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;