diff --git a/content/treestyletab/treestyletabbrowser.js b/content/treestyletab/treestyletabbrowser.js
index abb121b1..0a7c4767 100644
--- a/content/treestyletab/treestyletabbrowser.js
+++ b/content/treestyletab/treestyletabbrowser.js
@@ -1572,6 +1572,7 @@ TreeStyleTabBrowser.prototype = {
 									dontMove         : true
 								});
 							}
+							this.collapseExpandSubtree(aTab, false);
 							this.deleteTabValue(aTab, this.kSUBTREE_COLLAPSED);
 						}
 						else {