2 files changed, 6 insertions, 0 deletions
diff --git a/packages/types/CHANGELOG.json b/packages/types/CHANGELOG.json
index 53e1f3716..106dc3281 100644
--- a/packages/types/CHANGELOG.json
+++ b/packages/types/CHANGELOG.json
@@ -9,6 +9,10 @@
             {
                 "note": "Added `ZeroExTransaction` type for Exchange executeTransaction",
                 "pr": 1102
+            },
+            {
+                "note": "Add `AssetData` union type (`type AssetData = ERC20AssetData | ERC721AssetData`)",
+                "pr": 1131
             }
         ]
     },
diff --git a/packages/types/src/index.ts b/packages/types/src/index.ts
index d33048b61..3c9b6bbc5 100644
--- a/packages/types/src/index.ts
+++ b/packages/types/src/index.ts
@@ -168,6 +168,8 @@ export interface ERC721AssetData {
     tokenId: BigNumber;
 }
 
+export type AssetData = ERC20AssetData | ERC721AssetData;
+
 // TODO: DRY. These should be extracted from contract code.
 export enum RevertReason {
     OrderUnfillable = 'ORDER_UNFILLABLE',