diff --git a/chapter06/patch.xml b/chapter06/patch.xml
index 7ea07ddf4..1f8ae595a 100644
--- a/chapter06/patch.xml
+++ b/chapter06/patch.xml
@@ -13,7 +13,8 @@
 
 <sect2 role="package"><title/>
 <para>The Patch package contains a program for modifying or creating files by
-applying a <quote>patch</quote> file typically created by the diff program.</para>
+applying a <quote>patch</quote> file typically created by the
+<command>diff</command> program.</para>
 
 <segmentedlist>
 <segtitle>&buildtime;</segtitle>