diff --git a/src/data/codingcontracttypes.ts b/src/data/codingcontracttypes.ts
index b738ac548..e12c9ae4e 100644
--- a/src/data/codingcontracttypes.ts
+++ b/src/data/codingcontracttypes.ts
@@ -1,7 +1,7 @@
 import { getRandomInt } from "../utils/helpers/getRandomInt";
 import { MinHeap } from "../utils/Heap";
 
-// import { HammingEncode, HammingDecode } from "../utils/HammingCodeTools";
+import { HammingEncode, HammingDecode } from "../utils/HammingCodeTools";
 /* tslint:disable:completed-docs no-magic-numbers arrow-return-shorthand */
 
 /* Function that generates a valid 'data' for a contract type */
@@ -1247,7 +1247,7 @@ export const codingContractTypesMetadata: ICodingContractTypeMetadata[] = [
 
       return true;
     },
-  } /*
+  },
   {
     name: "HammingCodes: Integer to encoded Binary",
     numTries: 10,
@@ -1305,5 +1305,5 @@ export const codingContractTypesMetadata: ICodingContractTypeMetadata[] = [
     solver: (data: string, ans: string): boolean => {
       return parseInt(ans, 10) === HammingDecode(data);
     },
-  },*/,
+  },
 ];