diff --git a/CHANGES.txt b/CHANGES.txt
index 48140e7..7050129 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -7,6 +7,9 @@ Changelog
 - Fixed context for getting ajax results
   [kroman0]
 
+- Fixed conditional initialization of querywidget,
+  see https://dev.plone.org/ticket/12529 [kroman0]
+
 
 1.0b2 (2012-03-19)
 ------------------
diff --git a/plone/formwidget/querystring/querywidget.js b/plone/formwidget/querystring/querywidget.js
index f5c621a..fbddfa5 100644
--- a/plone/formwidget/querystring/querywidget.js
+++ b/plone/formwidget/querystring/querywidget.js
@@ -226,6 +226,11 @@
     // Enhance for javascript browsers
     $(document).ready(function () {
 
+        // Check if QueryWidget exists on page
+        if ($(".QueryWidget").length === 0) {
+            return false;
+        }
+
         // Init
         $.querywidget.init();