diff --git a/unistd-stream.lisp b/unistd-stream.lisp
index 681a352..10336e8 100644
--- a/unistd-stream.lisp
+++ b/unistd-stream.lisp
@@ -24,7 +24,7 @@
(defclass unistd-stream (ub8-stream)
((fd :initarg :fd
:reader stream-fd
- :type file-descriptor)
+ :type unistd:file-descriptor)
(blocking-p :initarg :blocking-p
:type boolean))
(:documentation "Base class for file descriptor streams."))