diff --git a/sdk/ng-sdk-js/ng-shex-orm/src/schema-converter/transformers/ShexJTypingTransformer.ts b/sdk/ng-sdk-js/ng-shex-orm/src/schema-converter/transformers/ShexJTypingTransformer.ts
index c5e4ec7..9cd7d68 100644
--- a/sdk/ng-sdk-js/ng-shex-orm/src/schema-converter/transformers/ShexJTypingTransformer.ts
+++ b/sdk/ng-sdk-js/ng-shex-orm/src/schema-converter/transformers/ShexJTypingTransformer.ts
@@ -678,7 +678,7 @@ export const ShexJTypingTransformerCompact = ShexJTraverser.createTransformer<
         transformer: async (_shapeOr, getTransformedChildren) => {
             const tc = await getTransformedChildren();
 
-            return dom.create.union(tc.shapeExprs);
+            return dom.create.union(tc.shapeExprs as dom.Type[]);
         },
     },