diff --git a/js/src/forum/components/RenameDiscussionModal.js b/js/src/forum/components/RenameDiscussionModal.js
index 2d1682236..30be96f33 100644
--- a/js/src/forum/components/RenameDiscussionModal.js
+++ b/js/src/forum/components/RenameDiscussionModal.js
@@ -49,7 +49,7 @@ export default class RenameDiscussionModal extends Modal {
 
     this.loading = true;
 
-    const title = this.newTitle;
+    const title = this.newTitle();
     const currentTitle = this.currentTitle;
 
     // If the title is different to what it was before, then save it. After the