diff --git a/reference/mysql/functions/mysql-errno.xml b/reference/mysql/functions/mysql-errno.xml
index 1054160433..d089c0b34f 100644
--- a/reference/mysql/functions/mysql-errno.xml
+++ b/reference/mysql/functions/mysql-errno.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.4 $ -->
+<!-- $Revision: 1.5 $ -->
 <!-- splitted from ./en/functions/mysql.xml, last change in rev 1.2 -->
   <refentry id="function.mysql-errno">
    <refnamediv>
@@ -57,6 +57,13 @@
        </screen>
      </example>
     </para>
+    <note>
+     <para>
+      If the optional argument is specified the given link
+      is used to retrieve the error code. If not, the last
+      opened link is used.
+     </para>
+    </note>
     <para>
      See also: <function>mysql_error</function>
     </para>
diff --git a/reference/mysql/functions/mysql-error.xml b/reference/mysql/functions/mysql-error.xml
index e4d217ccbb..dcbc685501 100644
--- a/reference/mysql/functions/mysql-error.xml
+++ b/reference/mysql/functions/mysql-error.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.5 $ -->
+<!-- $Revision: 1.6 $ -->
 <!-- splitted from ./en/functions/mysql.xml, last change in rev 1.2 -->
   <refentry id="function.mysql-error">
    <refnamediv>
@@ -56,6 +56,13 @@
        </screen>
      </example>
     </para>
+    <note>
+     <para>
+      If the optional argument is specified the given link
+      is used to retrieve the error message. If not, the last
+      opened link is used.
+     </para>
+    </note>
     <para>
      See also: <function>mysql_errno</function>
     </para>