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-rw-r--r--extcap/udpdump.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/extcap/udpdump.c b/extcap/udpdump.c
index 10bdacf105..6953f04d93 100644
--- a/extcap/udpdump.c
+++ b/extcap/udpdump.c
@@ -331,7 +331,7 @@ int main(int argc, char *argv[])
goto end;
case OPT_PORT:
- if (!ws_strtou16(optarg, &port)) {
+ if (!ws_strtou16(optarg, NULL, &port)) {
g_warning("Invalid port: %s", optarg);
goto end;
}