diff --git a/chapter04/settingenviron.xml b/chapter04/settingenviron.xml
index 8131efeb2..ead407f65 100644
--- a/chapter04/settingenviron.xml
+++ b/chapter04/settingenviron.xml
@@ -238,7 +238,7 @@ EOF</userinput></screen>
       Never pass a <parameter>-j</parameter> option without a number to
       <command>make</command> or set such an option in
       <envar>MAKEFLAGS</envar>.  Doing so will allow <command>make</command>
-      to spawn infinite build jobs and cause system stability issue.
+      to spawn infinite build jobs and cause system stability problems.
     </para>
   </important>