diff --git a/manpages/shorewall-ecn.xml b/manpages/shorewall-ecn.xml
index d6d43c4ee..b2ee58c96 100644
--- a/manpages/shorewall-ecn.xml
+++ b/manpages/shorewall-ecn.xml
@@ -22,7 +22,7 @@
     <title>Description</title>
 
     <para>Use this file to list the destinations for which you want to disable
-    ECN.</para>
+    ECN (Explicit Congestion Notification).</para>
 
     <para>The columns in the file are as follows.</para>
 
@@ -71,4 +71,4 @@
     shorewall-tcrules(5), shorewall-tos(5), shorewall-tunnels(5),
     shorewall-zones(5)</para>
   </refsect1>
-</refentry>
\ No newline at end of file
+</refentry>