diff --git a/src/wasi.rs b/src/wasi.rs
index a810c2ad437e8bf5ae8dde911f5935833cc9e6c1..50621fd5125f2d9ca817a43d6478df4b17557a28 100644
--- a/src/wasi.rs
+++ b/src/wasi.rs
@@ -36,6 +36,8 @@ pub type blksize_t = c_long;
 pub type blkcnt_t = i64;
 pub type nfds_t = c_ulong;
 
+pub type __wasi_rights_t = u64;
+
 #[allow(missing_copy_implementations)]
 #[cfg_attr(feature = "extra_traits", derive(Debug))]
 pub enum FILE {}