diff --git a/packages/providers/ethereum-mpc-provider/src/providers/signingProviders/signingUtils.ts b/packages/providers/ethereum-mpc-provider/src/providers/signingProviders/signingUtils.ts
index a82eb1595..6290c93d1 100644
--- a/packages/providers/ethereum-mpc-provider/src/providers/signingProviders/signingUtils.ts
+++ b/packages/providers/ethereum-mpc-provider/src/providers/signingProviders/signingUtils.ts
@@ -170,6 +170,7 @@ export function getProviderHandlers({
       const chainId = await providerEngineProxy.request<unknown, string>({ method: "eth_chainId" });
       await validateTypedSignMessageDataV4(msgParams, chainId);
       const data = typeof msgParams.data === "string" ? JSON.parse(msgParams.data) : msgParams.data;
+      if (data.types.EIP712Domain) delete data.types.EIP712Domain;
       const sig = signTypedData(sign, data, SignTypedDataVersion.V4);
       return sig;
     },