diff --git a/SWIG/Doc/Manual/Warnings.html b/SWIG/Doc/Manual/Warnings.html
index c5ec8548c..a7818bdf4 100644
--- a/SWIG/Doc/Manual/Warnings.html
+++ b/SWIG/Doc/Manual/Warnings.html
@@ -495,6 +495,10 @@ example.i(4): Syntax error in input.
 <li>845. Unmanaged code contains a call to a SWIG_CSharpSetPendingException method and C# code does not handle pending exceptions via the canthrow attribute. (C#).
 </ul>
 
+<ul>
+<li>870. Warning for <em>classname</em>: Base <em>baseclass</em> ignored. Multiple inheritance is not supported in Php4.   (Php4).
+</ul>
+
 <H3><a name="Warnings_nn16"></a>14.8.7 User defined (900-999)</H3>