Index: xwiki-platform-core/xwiki-core/src/main/java/com/xpn/xwiki/plugin/calendar/CalendarData.java
===================================================================
--- xwiki-platform-core/xwiki-core/src/main/java/com/xpn/xwiki/plugin/calendar/CalendarData.java	(revision 6456)
+++ xwiki-platform-core/xwiki-core/src/main/java/com/xpn/xwiki/plugin/calendar/CalendarData.java	(working copy)
@@ -271,7 +271,7 @@
                 result.append("<a href=\"" + url + "\">");
             }
             result.append(title);
-            if(title != null && !title.equals("")) {
+            if(url != null && !url.equals("")) {
                 result.append("</a>");
             }
             result.append("</div>");