diff --git a/packages/abi/src.ts/fragments.ts b/packages/abi/src.ts/fragments.ts
index 5feff220c5..1794c729a4 100644
--- a/packages/abi/src.ts/fragments.ts
+++ b/packages/abi/src.ts/fragments.ts
@@ -11,6 +11,7 @@ export interface JsonFragmentType {
     readonly name?: string;
     readonly indexed?: boolean;
     readonly type?: string;
+    readonly internalType?: any; // @TODO: in v6 reduce type
     readonly components?: ReadonlyArray<JsonFragmentType>;
 }
 
@@ -30,7 +31,6 @@ export interface JsonFragment {
     readonly gas?: string;
 };
 
-
 const _constructorGuard = { };
 
 // AST Node parser state