diff --git a/js/src/admin/index.js b/js/src/admin/index.js
index 67ddd35c82..d5212c69a2 100644
--- a/js/src/admin/index.js
+++ b/js/src/admin/index.js
@@ -10,8 +10,9 @@ export { app };
 // Export public API
 
 // Export compat API
-import compat from './compat';
+import compatObj from './compat';
+import proxifyCompat from '../common/utils/proxifyCompat';
 
-compat.app = app;
+compatObj.app = app;
 
-export { compat };
+export const compat = proxifyCompat(compatObj, 'admin');
diff --git a/js/src/common/compat.js b/js/src/common/compat.js
index 83036d1c5b..5df3654231 100644
--- a/js/src/common/compat.js
+++ b/js/src/common/compat.js
@@ -21,6 +21,7 @@ import stringToColor from './utils/stringToColor';
 import subclassOf from './utils/subclassOf';
 import SuperTextarea from './utils/SuperTextarea';
 import patchMithril from './utils/patchMithril';
+import proxifyCompat from './utils/proxifyCompat';
 import classList from './utils/classList';
 import extractText from './utils/extractText';
 import formatNumber from './utils/formatNumber';
@@ -94,6 +95,7 @@ export default {
   'utils/SuperTextarea': SuperTextarea,
   'utils/setRouteWithForcedRefresh': setRouteWithForcedRefresh,
   'utils/patchMithril': patchMithril,
+  'utils/proxifyCompat': proxifyCompat,
   'utils/classList': classList,
   'utils/extractText': extractText,
   'utils/formatNumber': formatNumber,
diff --git a/js/src/common/utils/proxifyCompat.ts b/js/src/common/utils/proxifyCompat.ts
new file mode 100644
index 0000000000..8ac7f05c9e
--- /dev/null
+++ b/js/src/common/utils/proxifyCompat.ts
@@ -0,0 +1,10 @@
+export default (compat: { [key: string]: any }, namespace: string) => {
+  // regex to replace common/ and NAMESPACE/ for core & core extensions
+  // e.g. admin/utils/extract --> utils/extract
+  // e.g. tags/common/utils/sortTags --> tags/utils/sortTags
+  const regex = new RegExp(`(\\w+\\/)?(${namespace}|common)\\/`);
+
+  return new Proxy(compat, {
+    get: (obj, prop: string) => obj[prop] || obj[prop.replace(regex, '$1')],
+  });
+};
diff --git a/js/src/forum/index.js b/js/src/forum/index.js
index 2a5e26fbd9..bdd5289d48 100644
--- a/js/src/forum/index.js
+++ b/js/src/forum/index.js
@@ -15,8 +15,9 @@ export { app };
 // export { IndexPage, DicsussionList } from './components';
 
 // Export compat API
-import compat from './compat';
+import compatObj from './compat';
+import proxifyCompat from '../common/utils/proxifyCompat';
 
-compat.app = app;
+compatObj.app = app;
 
-export { compat };
+export const compat = proxifyCompat(compatObj, 'forum');