diff --git a/src/fd/mod.rs b/src/fd/mod.rs
index bb54bdecc2..ada94b5ffa 100644
--- a/src/fd/mod.rs
+++ b/src/fd/mod.rs
@@ -86,6 +86,10 @@ bitflags! {
 		const S_IFSOCK = 0140000;
 		const S_IFLNK = 0o120000;
 		const S_IFREG = 0o100000;
+		const S_IFBLK = 0o060000;
+		const S_IFDIR = 0o040000;
+		const S_IFCHR = 0o020000;
+		const S_IFIFO = 0o010000;
 		const S_IRUSR = 0o400;
 		const S_IWUSR = 0o200;
 		const S_IXUSR = 0o100;