1 files changed, 2 insertions, 1 deletions
diff --git a/packages/contracts/src/utils/log_decoder.ts b/packages/contracts/src/utils/log_decoder.ts
index 79d41d2da..07127ba79 100644
--- a/packages/contracts/src/utils/log_decoder.ts
+++ b/packages/contracts/src/utils/log_decoder.ts
@@ -39,7 +39,8 @@ export class LogDecoder {
     }
     public decodeLogOrThrow<ArgsType extends DecodedLogArgs>(log: LogEntry): LogWithDecodedArgs<ArgsType> | RawLog {
         const logWithDecodedArgsOrLog = this._abiDecoder.tryToDecodeLogOrNoop(log);
-        if (_.isUndefined((logWithDecodedArgsOrLog).args)) {
+        // tslint:disable-next-line:no-unnecessary-type-assertion
+        if (_.isUndefined((logWithDecodedArgsOrLog as LogWithDecodedArgs<ArgsType>).args)) {
             throw new Error(`Unable to decode log: ${JSON.stringify(log)}`);
         }
         LogDecoder.wrapLogBigNumbers(logWithDecodedArgsOrLog);