diff --git a/static/scripts/rewards/web3/erc20-permit.ts b/static/scripts/rewards/web3/erc20-permit.ts
index f6e058c9..74ef8e9b 100644
--- a/static/scripts/rewards/web3/erc20-permit.ts
+++ b/static/scripts/rewards/web3/erc20-permit.ts
@@ -91,7 +91,7 @@ export async function transferFromPermit(permit2Contract: Contract, reward: Perm
         buttonController.showMakeClaim();
       } else {
         const { errorname, message } = decodeError(permit2Contract, e);
-        console.error(`Error in permitTransferFrom: ${errorname} [ ${message} ]`);
+        console.error(`Error in permitTransferFrom: ${errorname} ${message}`);
         errorToast(e, e.reason);
       }
     }
diff --git a/static/scripts/rewards/web3/erc721-permit.ts b/static/scripts/rewards/web3/erc721-permit.ts
index ba115e06..a689d255 100644
--- a/static/scripts/rewards/web3/erc721-permit.ts
+++ b/static/scripts/rewards/web3/erc721-permit.ts
@@ -73,7 +73,7 @@ export function claimErc721PermitHandler(reward: ERC721Permit) {
           buttonController.showMakeClaim();
         } else {
           const { errorname, message } = decodeError(nftContract, e);
-          console.error(`Error claiming NFT: ${errorname} [ ${message} ]`);
+          console.error(`Error claiming NFT: ${errorname} ${message}`);
           errorToast(e, e.reason);
         }
       } else if (typeof error === "string") {
diff --git a/static/scripts/rewards/web3/error-decoder.ts b/static/scripts/rewards/web3/error-decoder.ts
index 2508c77e..e0119f4c 100644
--- a/static/scripts/rewards/web3/error-decoder.ts
+++ b/static/scripts/rewards/web3/error-decoder.ts
@@ -8,13 +8,15 @@ export function decodeError(contract: Contract, err: MetaMaskError) {
   const res = iface.decodeErrorResult(selecter, errordata);
   const errorfragments = iface.getError(selecter);
 
-  let message;
+  let message = "";
   if (errorfragments.inputs.length > 0) {
+    message += "[ ";
     message = errorfragments.inputs
       .map((input, index) => {
         return `${input.name}: ${res[index].toString()}`;
       })
       .join(", ");
+    message += " ]";
   }
 
   return {