diff --git a/en_US.ISO8859-1/books/porters-handbook/book.sgml b/en_US.ISO8859-1/books/porters-handbook/book.sgml
index b7b92caf0d..315507055d 100644
--- a/en_US.ISO8859-1/books/porters-handbook/book.sgml
+++ b/en_US.ISO8859-1/books/porters-handbook/book.sgml
@@ -6002,7 +6002,7 @@ PLIST_SUB=      OCTAVE_VERSION=${OCTAVE_VERSION}</programlisting>
 		    <entry>5.1-CURRENT after 16550 UART constants moved from
 		      <filename>&lt;dev/sio/sioreg.h&gt;</filename> to
 		      <filename>&lt;dev/ic/ns16550.h&gt;</filename>.
-		      Also when libmap functionality was unconditional
+		      Also when libmap functionality was unconditionally
 		      supported by rtld.</entry>
 		    <entry>501107</entry>
 		  </row>