diff --git a/src/util/netdevice.cc b/src/util/netdevice.cc
index 6ae79553..e33eb3fa 100644
--- a/src/util/netdevice.cc
+++ b/src/util/netdevice.cc
@@ -35,7 +35,7 @@ void interface_ioctl( FileDescriptor & fd, const unsigned long request,
 {
     ifreq ifr;
     zero( ifr );
-    strncpy( ifr.ifr_name, name.c_str(), IFNAMSIZ ); /* interface name */
+    memcpy( ifr.ifr_name, name.c_str(), IFNAMSIZ ); /* interface name */
 
     ifr_adjustment( ifr );