diff --git a/src/js/redirect-engine.js b/src/js/redirect-engine.js
index 378183f6d..d24067847 100644
--- a/src/js/redirect-engine.js
+++ b/src/js/redirect-engine.js
@@ -790,7 +790,9 @@ RedirectEngine.prototype.loadBuiltinResources = function() {
 /******************************************************************************/
 
 RedirectEngine.prototype.getResourceDetails = function() {
-    const out = new Map();
+    const out = new Map([
+        [ 'none', { canInject: false, canRedirect: true, aliasOf: '' } ],
+    ]);
     for ( const [ name, entry ] of this.resources ) {
         out.set(name, {
             canInject: typeof entry.data === 'string',