diff --git a/src/core/containers.ml b/src/core/containers.ml
index 6db033eb..7a1a1574 100644
--- a/src/core/containers.ml
+++ b/src/core/containers.ml
@@ -27,6 +27,7 @@ module Hashtbl = struct
 end
 module Heap = CCHeap
 module Int = CCInt
+module Int32 = CCInt32  
 module Int64 = CCInt64
 module IO = CCIO
 module List = CCList