diff --git a/en_US.ISO8859-1/books/porters-handbook/book.sgml b/en_US.ISO8859-1/books/porters-handbook/book.sgml
index eeee7f05fd..d84552b90f 100644
--- a/en_US.ISO8859-1/books/porters-handbook/book.sgml
+++ b/en_US.ISO8859-1/books/porters-handbook/book.sgml
@@ -5573,6 +5573,11 @@ PLIST_SUB=      OCTAVE_VERSION=${OCTAVE_VERSION}</programlisting>
 		    </entry>
 		    <entry>501112</entry>
 		  </row>
+		  <row>
+		    <entry> 5.1-CURRENT after the if_xname change in
+		        struct ifnet</entry>
+		    <entry>501113</entry>
+		  </row>
                 </tbody>
               </tgroup>
             </informaltable>