diff --git a/xsl/calendar-summary.xsl b/xsl/calendar-summary.xsl
index a3e4d4a58..3535b5c15 100644
--- a/xsl/calendar-summary.xsl
+++ b/xsl/calendar-summary.xsl
@@ -19,7 +19,7 @@
         <!-- Events aus den News ziehen -->
         <xsl:for-each select="document('../news.xml')/page/news/newsfile">
           <xsl:apply-templates select="document(concat('../', .))/item/event">
-            <xsl:with-param name="link" select="substring-after(., 'content/')"/>
+            <xsl:with-param name="link" select="concat(substring-before(substring-after(., 'content/'), '.xml'), '.html')"/>
           </xsl:apply-templates>
         </xsl:for-each>
       </calendar-summary>