diff --git a/en_US.ISO8859-1/books/porters-handbook/book.sgml b/en_US.ISO8859-1/books/porters-handbook/book.sgml
index c13988f832..547e6fd213 100644
--- a/en_US.ISO8859-1/books/porters-handbook/book.sgml
+++ b/en_US.ISO8859-1/books/porters-handbook/book.sgml
@@ -5664,6 +5664,11 @@ PLIST_SUB=      OCTAVE_VERSION=${OCTAVE_VERSION}</programlisting>
                     <entry>Addition of vm_paddr_t.</entry>
                     <entry>500109</entry>
                   </row>
+                  <row>
+                    <entry>5.0-CURRENT after realpath(3) has been made
+		      thread-safe</entry>
+                    <entry>500110</entry>
+                  </row>
 
                 </tbody>
               </tgroup>