diff --git a/xsl/common.xsl b/xsl/common.xsl
index d499ac035..18578a4fe 100644
--- a/xsl/common.xsl
+++ b/xsl/common.xsl
@@ -573,7 +573,7 @@
 		  starts-with($newsfile, 'content/news/pentacast-') or
 		  starts-with($newsfile, 'content/news/pentamusic-')">
       <xsl:text>https://flattr.com/submit/auto?user_id=coloradio&amp;url=</xsl:text>
-      <xsl:value-of select="str:encode-uri(concat($baseurl, substring-after($newsfile, 'content/')), true())"/>
+      <xsl:value-of select="str:encode-uri(concat($baseurl, substring-before(substring-after($newsfile, 'content/'), '.xml'), '.html'), true())"/>
       <xsl:text>&amp;title=</xsl:text>
       <xsl:value-of select="str:encode-uri(document($newsfile)/item/@title, true())"/>
       <xsl:text>&amp;description=</xsl:text>