diff --git a/packages/background/src/keyring-starknet/service.ts b/packages/background/src/keyring-starknet/service.ts
index 0f650076c4..fb058c1099 100644
--- a/packages/background/src/keyring-starknet/service.ts
+++ b/packages/background/src/keyring-starknet/service.ts
@@ -294,7 +294,9 @@ export class KeyRingStarknetService {
           return true;
         }
         case "wallet_requestChainId": {
-          return currentChainId;
+          return shortString.encodeShortString(
+            currentChainId.replace("starknet:", "")
+          );
         }
         case "wallet_deploymentData": {
           throw new Error("Not implemented");