Index: system.c
==================================================================
--- system.c
+++ system.c
@@ -861,11 +861,11 @@
 	struct ifreq *iface_req = NULL;
 	int iface_req_cnt = 224, iface_req_len;
 	int idx, iface_cnt;
 	int ioctl_ret, tcl_ret;
 
-	iface_req_len = iface_req_cnt * sizeof(iface_req);
+	iface_req_len = iface_req_cnt * sizeof(*iface_req);
 	iface_req = malloc(iface_req_len);
 	if (iface_req == NULL) {
 		/* Report failure */
 		Tcl_SetObjResult(interp, Tcl_NewStringObj("unable to allocate memory", -1));