diff --git a/containers.mllib b/containers.mllib
index 9f0c8e14..ae106d5d 100644
--- a/containers.mllib
+++ b/containers.mllib
@@ -3,6 +3,7 @@ Deque
 Graph
 Cache
 FlatHashtbl
+FHashtbl
 FQueue
 SplayTree
 PHashtbl