diff --git a/package/gluon-radv-filterd/src/gluon-radv-filterd.c b/package/gluon-radv-filterd/src/gluon-radv-filterd.c
index 8d515677..d1f8dc76 100644
--- a/package/gluon-radv-filterd/src/gluon-radv-filterd.c
+++ b/package/gluon-radv-filterd/src/gluon-radv-filterd.c
@@ -318,7 +318,7 @@ static void router_update(const struct ether_addr *mac, uint16_t timeout) {
 static void handle_ra(int sock) {
 	struct sockaddr_ll src;
 	struct ether_addr mac;
-	unsigned int addr_size = sizeof(src);
+	socklen_t addr_size = sizeof(src);
 	ssize_t len;
 	struct {
 		struct ip6_hdr ip6;