diff --git a/en_US.ISO8859-1/books/porters-handbook/book.sgml b/en_US.ISO8859-1/books/porters-handbook/book.sgml
index cf49a92d1e..b542844c99 100644
--- a/en_US.ISO8859-1/books/porters-handbook/book.sgml
+++ b/en_US.ISO8859-1/books/porters-handbook/book.sgml
@@ -5707,6 +5707,11 @@ PLIST_SUB=      OCTAVE_VERSION=${OCTAVE_VERSION}</programlisting>
                     <entry>5.1-CURRENT after branching for RELENG_5_1.</entry>
                     <entry>501100</entry>
                   </row>
+                  <row>
+                    <entry>5.1-CURRENT after correcting the semantics of
+		      sigtimedwait(2) and sigwaitinfo(2).</entry>
+                    <entry>501101</entry>
+                  </row>
 
                 </tbody>
               </tgroup>