diff --git a/src/fiber.h b/src/fiber.h
index 89de53f622612bba1779e98feac5a47b9b3f72ef..6ef4bb1a2e89c6e0e95c095d3636e7e76f0abdab 100644
--- a/src/fiber.h
+++ b/src/fiber.h
@@ -110,7 +110,6 @@ struct fiber {
 	va_list f_data;
 	uint32_t flags;
 	struct fiber *waiter;
-	uint64_t cookie;
 	int lua_storage;
 };