diff --git a/documentation/ref-manual/ref-classes.xml b/documentation/ref-manual/ref-classes.xml
index 54c272e5da..693b613092 100644
--- a/documentation/ref-manual/ref-classes.xml
+++ b/documentation/ref-manual/ref-classes.xml
@@ -232,7 +232,7 @@
     <title><filename>boot-directdisk.bbclass</filename></title>
 
     <para>
-        The boot direct disk (<filename>boot-directdisk</filename>) class
+        The <filename>boot-directdisk</filename> class
         creates an image that can be placed directly onto a hard disk using
         <filename>dd</filename> and then booted.
         The image uses SYSLINUX.