diff --git a/basis/unix/types/linux/linux.factor b/basis/unix/types/linux/linux.factor
index 65731335d8..f32d8a23c4 100644
--- a/basis/unix/types/linux/linux.factor
+++ b/basis/unix/types/linux/linux.factor
@@ -17,6 +17,7 @@ TYPEDEF: __uword_type     nlink_t
 TYPEDEF: __u32_type       uid_t
 TYPEDEF: __u32_type       gid_t
 TYPEDEF: __slongword_type off_t
+TYPEDEF: off_t            __off_t
 TYPEDEF: __slongword_type blksize_t
 TYPEDEF: __slongword_type blkcnt_t
 TYPEDEF: __sword_type     ssize_t