1 files changed, 2 insertions, 1 deletions
diff --git a/packages/contract-wrappers/src/contract_wrappers/contract_wrapper.ts b/packages/contract-wrappers/src/contract_wrappers/contract_wrapper.ts
index e646bae78..04f69bc3d 100644
--- a/packages/contract-wrappers/src/contract_wrappers/contract_wrapper.ts
+++ b/packages/contract-wrappers/src/contract_wrappers/contract_wrapper.ts
@@ -35,7 +35,8 @@ const CONTRACT_NAME_TO_NOT_FOUND_ERROR: {
     Exchange: ContractWrappersError.ExchangeContractDoesNotExist,
 };
 
-export class ContractWrapper {
+export abstract class ContractWrapper {
+    public abstract abi: ContractAbi;
     protected _web3Wrapper: Web3Wrapper;
     protected _networkId: number;
     private _blockAndLogStreamerIfExists?: BlockAndLogStreamer;