diff --git a/doc/comedilib_html_config.xsl b/doc/comedilib_html_config.xsl
index 6b1ec90..acff656 100644
--- a/doc/comedilib_html_config.xsl
+++ b/doc/comedilib_html_config.xsl
@@ -7,4 +7,5 @@
 	<xsl:param name="generate.section.toc.level" select="4"/>
 	<xsl:param name="html.stylesheet">comedilib.css</xsl:param>
 	<xsl:param name="funcsynopsis.style">ansi</xsl:param>
+	<xsl:param name="function.parens" select="1"/>
 </xsl:stylesheet>