2 files changed, 5 insertions, 2 deletions
diff --git a/packages/0x.js/src/contract_wrappers/contract_wrapper.ts b/packages/0x.js/src/contract_wrappers/contract_wrapper.ts
index 7997b1647..70548293c 100644
--- a/packages/0x.js/src/contract_wrappers/contract_wrapper.ts
+++ b/packages/0x.js/src/contract_wrappers/contract_wrapper.ts
@@ -100,7 +100,7 @@ export class ContractWrapper {
             if (filterUtils.matchesFilter(log, filter)) {
                 const decodedLog = this._tryToDecodeLogOrNoop(log) as LogWithDecodedArgs<ArgsType>;
                 const logEvent = {
-                    ...decodedLog,
+                    log: decodedLog,
                     removed,
                 };
                 this._filterCallbacks[filterToken](null, logEvent);
diff --git a/packages/0x.js/src/types.ts b/packages/0x.js/src/types.ts
index c3aabfd86..d94868d9f 100644
--- a/packages/0x.js/src/types.ts
+++ b/packages/0x.js/src/types.ts
@@ -40,7 +40,10 @@ export type OrderValues = [BigNumber, BigNumber, BigNumber,
                            BigNumber, BigNumber, BigNumber];
 
 export type LogEvent = Web3.LogEntryEvent;
-export type DecodedLogEvent<ArgsType> = Web3.DecodedLogEntryEvent<ArgsType>;
+export interface DecodedLogEvent<ArgsType> {
+    removed: boolean;
+    log: LogWithDecodedArgs<ArgsType>;
+}
 
 export type EventCallback<ArgsType> = (err: null|Error, log?: DecodedLogEvent<ArgsType>) => void;
 export type EventWatcherCallback = (log: LogEvent) => void;