1 files changed, 3 insertions, 0 deletions
diff --git a/toolkit/jetpack/sdk/ui.js b/toolkit/jetpack/sdk/ui.js
index 7f9110b26..d1ff7ceb8 100644
--- a/toolkit/jetpack/sdk/ui.js
+++ b/toolkit/jetpack/sdk/ui.js
@@ -6,12 +6,15 @@
 module.metadata = {
   'stability': 'experimental',
   'engines': {
+    'Palemoon': '> 27',
     'Firefox': '> 28'
   }
 };
 
 exports.ActionButton = require('./ui/button/action').ActionButton;
 exports.ToggleButton = require('./ui/button/toggle').ToggleButton;
+#ifndef MC_PALEMOON
 exports.Sidebar = require('./ui/sidebar').Sidebar;
 exports.Frame = require('./ui/frame').Frame;
 exports.Toolbar = require('./ui/toolbar').Toolbar;
+#endif