diff --git a/manpages/shorewall-interfaces.xml b/manpages/shorewall-interfaces.xml
index 3b9564d8d..a75d0777d 100644
--- a/manpages/shorewall-interfaces.xml
+++ b/manpages/shorewall-interfaces.xml
@@ -319,7 +319,9 @@ loc     eth2            -</programlisting>
 
               <listitem>
                 <para>When specified, causes the generated script to ignore
-                up/down events from Shorewall-init for this device.</para>
+                up/down events from Shorewall-init for this device.
+                Additionally, the option exempts the interface from hairpin
+                filtering.</para>
               </listitem>
             </varlistentry>
 
diff --git a/manpages6/shorewall6-interfaces.xml b/manpages6/shorewall6-interfaces.xml
index 85c35f7ab..060f051f5 100644
--- a/manpages6/shorewall6-interfaces.xml
+++ b/manpages6/shorewall6-interfaces.xml
@@ -221,7 +221,9 @@ loc     eth2            -</programlisting>
 
               <listitem>
                 <para>When specified, causes the generated script to ignore
-                up/down events from Shorewall-init for this device.</para>
+                up/down events from Shorewall-init for this device.
+                Additionally, the option exempts the interface from hairpin
+                filtering.</para>
               </listitem>
             </varlistentry>