1 files changed, 1 insertions, 1 deletions

diff --git a/src/fnet/arp.c b/src/fnet/arp.c
index 2b6df6945..794f6c8c8 100644
--- a/src/fnet/arp.c
+++ b/src/fnet/arp.c
@@ -60,7 +60,7 @@ void arp_scan(const char *dev, uint32_t ifip, uint32_t ifmask) {
                 errExit("socket");
         struct ifreq ifr;
         memset(&ifr, 0, sizeof (ifr));
-        strncpy(ifr.ifr_name, dev, IFNAMSIZ);
+        strncpy(ifr.ifr_name, dev, IFNAMSIZ - 1);
         if (ioctl(sock, SIOCGIFHWADDR, &ifr) < 0)
                 errExit("ioctl");
         close(sock);