diff --git a/en_US.ISO8859-1/books/porters-handbook/special/chapter.xml b/en_US.ISO8859-1/books/porters-handbook/special/chapter.xml
index c912b312d9..9eb9ebce24 100644
--- a/en_US.ISO8859-1/books/porters-handbook/special/chapter.xml
+++ b/en_US.ISO8859-1/books/porters-handbook/special/chapter.xml
@@ -826,7 +826,7 @@ CMAKE_OFF=	VAR3</programlisting>
 	<title>Variables the Users Can Define for
 	  <command>cargo</command> Builds</title>
 
-	<tgroup cols="2">
+	<tgroup cols="3">
 	  <thead>
 	    <row>
 	      <entry>Variable</entry>