diff --git a/toolkit/content/widgets/scrollbox.xml b/toolkit/content/widgets/scrollbox.xml
index 4c11d8fb1417..4de2625369d8 100644
--- a/toolkit/content/widgets/scrollbox.xml
+++ b/toolkit/content/widgets/scrollbox.xml
@@ -173,6 +173,7 @@
           if (childNodes && childNodes.length) {
             if (childNodes.length > 0)
               this.ensureElementIsVisible(childNodes[0]);
+          }
         }
         catch(e) {
           this._scrollButtonUp.collapsed = false;