diff --git a/addon-sdk/source/lib/sdk/content/sandbox.js b/addon-sdk/source/lib/sdk/content/sandbox.js
index 90a2a00bca6..bcfdac15a87 100644
--- a/addon-sdk/source/lib/sdk/content/sandbox.js
+++ b/addon-sdk/source/lib/sdk/content/sandbox.js
@@ -143,7 +143,7 @@ const WorkerSandbox = Class({
       sandboxPrototype: proto,
       wantXrays: true,
       wantGlobalProperties: wantGlobalProperties,
-      wantExportHelpers: !waiveSecurityMembrane,
+      wantExportHelpers: true,
       sameZoneAs: window,
       metadata: {
         SDKContentScript: true,