diff --git a/framework/core/js/forum/src/app.js b/framework/core/js/forum/src/app.js
index 9aa36238f..d68d374ef 100644
--- a/framework/core/js/forum/src/app.js
+++ b/framework/core/js/forum/src/app.js
@@ -1,5 +1,6 @@
 import App from 'flarum/utils/app';
 import store from 'flarum/initializers/store';
+import stateHelpers from 'flarum/initializers/state-helpers';
 import discussionControls from 'flarum/initializers/discussion-controls';
 import postControls from 'flarum/initializers/post-controls';
 import preload from 'flarum/initializers/preload';
@@ -12,6 +13,7 @@ import boot from 'flarum/initializers/boot';
 var app = new App();
 
 app.initializers.add('store', store);
+app.initializers.add('state-helpers', stateHelpers);
 app.initializers.add('discussion-controls', discussionControls);
 app.initializers.add('post-controls', postControls);
 app.initializers.add('session', session);
diff --git a/framework/core/js/forum/src/initializers/state-helpers.js b/framework/core/js/forum/src/initializers/state-helpers.js
new file mode 100644
index 000000000..3363a6ff6
--- /dev/null
+++ b/framework/core/js/forum/src/initializers/state-helpers.js
@@ -0,0 +1,14 @@
+import ReplyComposer from 'flarum/components/reply-composer';
+import DiscussionPage from 'flarum/components/discussion-page';
+
+export default function(app) {
+  app.composingReplyTo = function(discussion) {
+    return this.composer.component instanceof ReplyComposer &&
+      this.composer.component.props.discussion === discussion;
+  };
+
+  app.viewingDiscussion = function(discussion) {
+    return this.current instanceof DiscussionPage &&
+      this.current.discussion() === discussion;
+  };
+};