diff --git a/en_US.ISO8859-1/books/porters-handbook/book.sgml b/en_US.ISO8859-1/books/porters-handbook/book.sgml
index 1e362aa646..d21ee9c211 100644
--- a/en_US.ISO8859-1/books/porters-handbook/book.sgml
+++ b/en_US.ISO8859-1/books/porters-handbook/book.sgml
@@ -5218,6 +5218,12 @@ PLIST_SUB=      OCTAVE_VERSION=${OCTAVE_VERSION}</programlisting>
 		    <entry>490100</entry>
 		  </row>
 
+		  <row>
+		    <entry>4.9-STABLE after e_sid was added to struct
+		      kinfo_eproc.</entry>
+		    <entry>490101</entry>
+		  </row>
+
 		  <row>
 		    <entry>5.0-CURRENT</entry>
 		    <entry>500000</entry>