diff --git a/winsup/doc/ChangeLog b/winsup/doc/ChangeLog
index 2d0c07bac..bde9d7217 100644
--- a/winsup/doc/ChangeLog
+++ b/winsup/doc/ChangeLog
@@ -1,3 +1,9 @@
+2015-06-17  Jon Turney  <jon.turney@dronecode.org.uk>
+
+	* fo.xsl: Render funcsynopsis elements as ANSI style function
+	prototypes.
+	* html.xsl: Ditto.
+
 2015-06-17  Jon Turney  <jon.turney@dronecode.org.uk>
 
 	* html.xsl: Renamed from cygwin.xsl.
diff --git a/winsup/doc/fo.xsl b/winsup/doc/fo.xsl
index ba8e19138..f3fee0b14 100644
--- a/winsup/doc/fo.xsl
+++ b/winsup/doc/fo.xsl
@@ -65,4 +65,7 @@
   </xsl:if>
 </xsl:template>
 
+	<!-- generate ansi rather than k&r style function synopses -->
+	<xsl:param name="funcsynopsis.style" select="ansi" />
+
 </xsl:stylesheet>
diff --git a/winsup/doc/html.xsl b/winsup/doc/html.xsl
index 2b02ea870..59b77357a 100644
--- a/winsup/doc/html.xsl
+++ b/winsup/doc/html.xsl
@@ -23,4 +23,7 @@
 <!-- suppress refentry in toc being annotated with refpurpose -->
 <xsl:param name="annotate.toc" select="0" />
 
+<!-- generate ansi rather than k&r style function synopses -->
+<xsl:param name="funcsynopsis.style" select="ansi" />
+
 </xsl:stylesheet>