diff --git a/lib/jbuild b/lib/jbuild
index 8b14862..590784b 100644
--- a/lib/jbuild
+++ b/lib/jbuild
@@ -1,6 +1,6 @@
 (library
  ((name xenstore_transport)
   (public_name xenstore_transport)
-  (libraries (lwt xenstore xenstore.client))
+  (libraries (lwt xenstore xenstore.client lwt.unix))
   (wrapped false)
 ))