diff --git a/app/scripts/metamask-controller.js b/app/scripts/metamask-controller.js
index 03e021a92..1a468b6c7 100644
--- a/app/scripts/metamask-controller.js
+++ b/app/scripts/metamask-controller.js
@@ -221,7 +221,6 @@ module.exports = class MetamaskController extends EventEmitter {
         eth_syncing: false,
         web3_clientVersion: `MetaMask/v${version}`,
       },
-      originHttpHeaderKey: 'X-Metamask-Origin',
       // account mgmt
       getAccounts: (cb) => {
         const isUnlocked = this.keyringController.memStore.getState().isUnlocked