diff --git a/browser/modules/Sanitizer.jsm b/browser/modules/Sanitizer.jsm
index 4f57ef36377c..730af0e01e05 100644
--- a/browser/modules/Sanitizer.jsm
+++ b/browser/modules/Sanitizer.jsm
@@ -158,7 +158,7 @@ Sanitizer.prototype = {
         while (windows.hasMoreElements()) {
           var searchBar = windows.getNext().document.getElementById("searchbar");
           if (searchBar) {
-            searchBar.textbox.value = "";
+            searchBar.value = "";
             searchBar.textbox.editor.enableUndo(false);
             searchBar.textbox.editor.enableUndo(true);
           }