diff --git a/chapter07/udev.xml b/chapter07/udev.xml
index a099e0f90..7e11388d8 100644
--- a/chapter07/udev.xml
+++ b/chapter07/udev.xml
@@ -155,7 +155,7 @@
       any words in this file other than comments are considered subsystem names
       to trigger at retry time.  To find the subsystem of a device, use
       <command>udevadm info --attribute-walk &lt;device&gt;</command> where
-      &lt;device&gt; is a an absolute path in /dev or /sys such as /dev/sr0 or
+      &lt;device&gt; is an absolute path in /dev or /sys such as /dev/sr0 or
       /sys/class/rtc.</para>
 
     </sect3>