diff --git a/xsl/qo-section.xsl b/xsl/qo-section.xsl
index 299ad19..03f67cd 100644
--- a/xsl/qo-section.xsl
+++ b/xsl/qo-section.xsl
@@ -22,7 +22,7 @@ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
 -->
-<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="2.0" xmlns:xs="http://www.w3.org/2001/XMLSchema" exclude-result-prefixes="xs z">
+<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="2.0" xmlns:xs="http://www.w3.org/2001/XMLSchema" exclude-result-prefixes="xs">
   <xsl:template name="qo-section">
     <xsl:param name="what" as="xs:string"/>
     <xsl:param name="title" as="xs:string"/>