diff --git a/getroute.c b/getroute.c
index 5f9475e..a615a4f 100644
--- a/getroute.c
+++ b/getroute.c
@@ -90,7 +90,8 @@
  * err  - netlink message
  * arg  - (int *) storage for the error number
  */
-static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg) {
+static int error_handler(__attribute__((unused)) struct sockaddr_nl *nla,
+                         struct nlmsgerr *err, void *arg) {
   int *retval = arg;
   if(err->error < 0) { // error_handler called even on no error (NLMSG_ERROR reply type used)
     *retval = err->error;