diff --git a/core/AmConfig.cpp b/core/AmConfig.cpp
index 1795d20a..58a8b627 100644
--- a/core/AmConfig.cpp
+++ b/core/AmConfig.cpp
@@ -1011,7 +1011,8 @@ static bool fillSysIntfList()
       intf_it->flags = p_if->ifa_flags;
 
       struct ifreq ifr;
-      strncpy(ifr.ifr_name,p_if->ifa_name,IFNAMSIZ);
+      strncpy(ifr.ifr_name, p_if->ifa_name, sizeof(ifr.ifr_name) - 1);
+      ifr.ifr_name[sizeof(ifr.ifr_name) - 1] = '\0';
 
       if (ioctl(fd, SIOCGIFMTU, &ifr) < 0 ) {
 	ERROR("ioctl: %s",strerror(errno));