diff --git a/functions/pdf.xml b/functions/pdf.xml
index af9fc13f31..2e11538a8c 100644
--- a/functions/pdf.xml
+++ b/functions/pdf.xml
@@ -1,4 +1,4 @@
-<!-- $Revision: 1.64 $ -->
+<!-- $Revision: 1.65 $ -->
  <reference id="ref.pdf">
   <title>PDF functions </title>
   <titleabbrev>PDF</titleabbrev>
@@ -623,24 +623,54 @@ pdf_delete($pdf);
   <refentry id="function.pdf-arc">
    <refnamediv>
     <refname>pdf_arc</refname>
-    <refpurpose>Draws an arc</refpurpose>
+    <refpurpose>Draws an arc (counterclockwise)</refpurpose>
    </refnamediv>
    <refsect1>
     <title>Description</title>
     <funcsynopsis>
      <funcprototype>
       <funcdef>void <function>pdf_arc</function></funcdef>
-      <paramdef>int <parameter>pdf object</parameter></paramdef>
-      <paramdef>double <parameter>x</parameter></paramdef>
-      <paramdef>double <parameter>y</parameter></paramdef>
-      <paramdef>double <parameter>r</parameter></paramdef>
-      <paramdef>double <parameter>alpha</parameter></paramdef>
-      <paramdef>double <parameter>beta</parameter></paramdef>
+      <paramdef>resource <parameter>pdf object</parameter></paramdef>
+      <paramdef>float <parameter>x</parameter></paramdef>
+      <paramdef>float <parameter>y</parameter></paramdef>
+      <paramdef>float <parameter>r</parameter></paramdef>
+      <paramdef>float <parameter>alpha</parameter></paramdef>
+      <paramdef>float <parameter>beta</parameter></paramdef>
      </funcprototype>
     </funcsynopsis>
     <para>
      Draw a counterclockwise circular arc from alpha to beta degrees
     </para>
+	<para>
+	 See also: <function>pdf_arcn</function>
+	</para>
+   </refsect1>
+  </refentry>
+
+  <refentry id="function.pdf-arcn">
+   <refnamediv>
+    <refname>pdf_arcn</refname>
+    <refpurpose>Draws an arc (clockwise)</refpurpose>
+   </refnamediv>
+   <refsect1>
+    <title>Description</title>
+    <funcsynopsis>
+     <funcprototype>
+      <funcdef>void <function>pdf_arc</function></funcdef>
+      <paramdef>resource <parameter>pdf object</parameter></paramdef>
+      <paramdef>float <parameter>x</parameter></paramdef>
+      <paramdef>float <parameter>y</parameter></paramdef>
+      <paramdef>float <parameter>r</parameter></paramdef>
+      <paramdef>float <parameter>alpha</parameter></paramdef>
+      <paramdef>float <parameter>beta</parameter></paramdef>
+     </funcprototype>
+    </funcsynopsis>
+    <para>
+     Draw a clockwise circular arc from alpha to beta degrees
+    </para>
+	<para>
+	 See also: <function>pdf_arc</function>
+	</para>
    </refsect1>
   </refentry>
 
@@ -2834,4 +2864,5 @@ sgml-exposed-tags:nil
 sgml-local-catalogs:nil
 sgml-local-ecat-files:nil
 End:
+vim: ts=1 sw=1 et syntax=sgml
 -->