diff --git a/devtools/shared/specs/frame.js b/devtools/shared/specs/frame.js
index 6c349745b7dd..6365d6e9090c 100644
--- a/devtools/shared/specs/frame.js
+++ b/devtools/shared/specs/frame.js
@@ -3,7 +3,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 "use strict";
 
-const {Arg, RetVal, generateActorSpec} = require("devtools/shared/protocol");
+const {generateActorSpec} = require("devtools/shared/protocol");
 
 const frameSpec = generateActorSpec({
   typeName: "frame",