Index: en_US.ISO8859-1/books/porters-handbook/special/chapter.xml
===================================================================
--- en_US.ISO8859-1/books/porters-handbook/special/chapter.xml
+++ en_US.ISO8859-1/books/porters-handbook/special/chapter.xml
@@ -513,7 +513,7 @@
 	explicitly disable this feature by adding the
 	<literal>MAKE_JOBS_UNSAFE=yes</literal> variable.  It is
 	used when a port is known to be broken with
-	<varname>-jX</varname>.</para>
+	<varname>-jX</varname> due to race conditions.</para>
 
       <important>
 	<para>When setting <varname>MAKE_JOBS_UNSAFE</varname>, it