diff --git a/reference/math/functions/atan2.xml b/reference/math/functions/atan2.xml
index f529aa2cb0..ecb68cc9f6 100644
--- a/reference/math/functions/atan2.xml
+++ b/reference/math/functions/atan2.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.7 $ -->
+<!-- $Revision: 1.8 $ -->
 <refentry id="function.atan2">
  <refnamediv>
   <refname>atan2</refname>
@@ -51,7 +51,7 @@
  <refsect1 role="returnvalues">
   &reftitle.returnvalues;
   <para>
-   The arc tangent of <parameter>x</parameter>/<parameter>y</parameter> 
+   The arc tangent of <parameter>y</parameter>/<parameter>x</parameter> 
    in radians.
   </para>
  </refsect1>