diff --git a/vendored/libfuse/include/fuse_lowlevel.h b/vendored/libfuse/include/fuse_lowlevel.h
index 00ed1ee7..ff3dd507 100644
--- a/vendored/libfuse/include/fuse_lowlevel.h
+++ b/vendored/libfuse/include/fuse_lowlevel.h
@@ -540,7 +540,7 @@ int fuse_lowlevel_is_lib_option(const char *opt);
  */
 struct fuse_session *fuse_lowlevel_new(struct fuse_args *args,
                                        const struct fuse_lowlevel_ops *op,
-                                       size_t op_size, void *userdata);
+                                       size_t op_size);
 
 /* ----------------------------------------------------------- *
  * Session interface					       *