diff --git a/src/zen/folders/ZenFolder.mjs b/src/zen/folders/ZenFolder.mjs
index f17c25177..cd6418d4c 100644
--- a/src/zen/folders/ZenFolder.mjs
+++ b/src/zen/folders/ZenFolder.mjs
@@ -256,6 +256,7 @@ export class nsZenFolder extends MozTabbrowserTabGroup {
       folderToUnload: this,
     });
     this.activeTabs = [];
+    this.collapsed = true;
   }
 
   on_click(event) {