diff --git a/unix/ztypes_dragonfly_amd64.go b/unix/ztypes_dragonfly_amd64.go
index 18afb221..67c6bf88 100644
--- a/unix/ztypes_dragonfly_amd64.go
+++ b/unix/ztypes_dragonfly_amd64.go
@@ -443,6 +443,6 @@ type Termios struct {
 }
 
 const (
-	AT_FDCWD            = -0x64
+	AT_FDCWD            = 0xfffafdcd
 	AT_SYMLINK_NOFOLLOW = 0x1
 )