diff --git a/checkstyle/src/plugin-resources/checkstyle.xsl b/checkstyle/src/plugin-resources/checkstyle.xsl
index da1b14d9..2ce979e6 100644
--- a/checkstyle/src/plugin-resources/checkstyle.xsl
+++ b/checkstyle/src/plugin-resources/checkstyle.xsl
@@ -98,7 +98,7 @@
           </tr>
 
         <xsl:for-each select="//error[@severity=$severity]" >
-          <xsl:sort select="@count" order="descending"/>
+          <xsl:sort select="@count" data-type="number" order="descending"/>
           <xsl:sort select="@message"/>
           <tr>
                 <td><xsl:value-of select="@message" /></td>