diff --git a/Modules/socketmodule.c b/Modules/socketmodule.c
index 7176674..d8c81fe 100644
--- a/Modules/socketmodule.c
+++ b/Modules/socketmodule.c
@@ -1674,7 +1674,8 @@
             if (len == 0) {
                 ifr.ifr_ifindex = 0;
             } else if (len < sizeof(ifr.ifr_name)) {
-                strcpy(ifr.ifr_name, PyBytes_AS_STRING(interfaceName));
+                strncpy(ifr.ifr_name, PyBytes_AS_STRING(interfaceName), sizeof(ifr.ifr_name));
+                ifr.ifr_name[(sizeof(ifr.ifr_name))-1] = '\0';
                 if (ioctl(s->sock_fd, SIOCGIFINDEX, &ifr) < 0) {
                     s->errorhandler();
                     Py_DECREF(interfaceName);