diff --git a/src/ph_socket.c b/src/ph_socket.c
index ad0964b..1224c15 100644
--- a/src/ph_socket.c
+++ b/src/ph_socket.c
@@ -32,8 +32,8 @@
 #include "logging.h"
 #include "ph_socket.h"
 
-int ph_socket_listen_cb(struct osmo_fd *ofd, unsigned int what);
-int ph_socket_connect_cb(struct osmo_fd *ofd, unsigned int what);
+int ph_socket_listen_cb(struct osmo_fd *ofd, unsigned int __attribute__((unused)) what);
+int ph_socket_connect_cb(struct osmo_fd *ofd, unsigned int __attribute__((unused)) what);
 static void ph_socket_timeout_cb(void *data);
 
 static void open_connection(ph_socket_t *s)
@@ -176,7 +176,7 @@ void ph_socket_exit(ph_socket_t *s)
 		osmo_timer_del(&s->retry_timer);
 }
 
-int ph_socket_listen_cb(struct osmo_fd *ofd, unsigned int what)
+int ph_socket_listen_cb(struct osmo_fd *ofd, unsigned int __attribute__((unused)) what)
 {
 	ph_socket_t *s = ofd->data;
 	struct sockaddr_un sock_address;
@@ -209,7 +209,7 @@ int ph_socket_listen_cb(struct osmo_fd *ofd, unsigned int what)
 	return 0;
 }
 
-int ph_socket_connect_cb(struct osmo_fd *ofd, unsigned int what)
+int ph_socket_connect_cb(struct osmo_fd *ofd, unsigned __attribute__((unused)) int what)
 {
 	ph_socket_t *s = ofd->data;
 	int rc;