diff --git a/src/wayland-server.c b/src/wayland-server.c
index 70adf289..3b166c98 100644
--- a/src/wayland-server.c
+++ b/src/wayland-server.c
@@ -173,7 +173,8 @@ wl_client_connection_data(int fd, uint32_t mask, void *data)
 	struct wl_object *object;
 	struct wl_closure *closure;
 	const struct wl_message *message;
-	uint32_t p[2], opcode, size;
+	uint32_t p[2];
+	int opcode, size;
 	uint32_t cmask = 0;
 	int len;