diff --git a/src/Language/Wasm/Structure.hs b/src/Language/Wasm/Structure.hs
index 44c659a..1c8db11 100644
--- a/src/Language/Wasm/Structure.hs
+++ b/src/Language/Wasm/Structure.hs
@@ -32,6 +32,7 @@ module Language.Wasm.Structure (
     ValueType(..),
     ParamsType,
     ResultType,
+    LocalsType,
     Expression,
     LabelIndex,
     FuncIndex,