diff --git a/Shorewall/manpages/shorewall.xml b/Shorewall/manpages/shorewall.xml
index a710cfaf9..dc533d21b 100644
--- a/Shorewall/manpages/shorewall.xml
+++ b/Shorewall/manpages/shorewall.xml
@@ -691,6 +691,8 @@
 
       <arg><option>-D</option></arg>
 
+      <arg><option>-i</option></arg>
+
       <arg><replaceable>directory</replaceable></arg>
     </cmdsynopsis>
 
@@ -1776,6 +1778,13 @@
           updated, the original is saved in a .bak file in the same
           directory.</para>
 
+          <para>The -i option was added in Shorewall 4.6.0. When this option
+          is specified, the compiler will walk through the directories in the
+          CONFIG_PATH replacing alternative column specifications following a
+          semicolon (";") to alternate column specifications enclosed in curly
+          braces ("{...}"). When a file is updated, the original is saved in a
+          .bak file in the same directory.</para>
+
           <para>For a description of the other options, see the <emphasis
           role="bold">check</emphasis> command above.</para>
         </listitem>
diff --git a/Shorewall6/manpages/shorewall6.xml b/Shorewall6/manpages/shorewall6.xml
index e86d8b1fc..83f305b61 100644
--- a/Shorewall6/manpages/shorewall6.xml
+++ b/Shorewall6/manpages/shorewall6.xml
@@ -606,6 +606,8 @@
 
       <arg><option>-D</option></arg>
 
+      <arg><option>-i</option></arg>
+
       <arg><replaceable>directory</replaceable></arg>
     </cmdsynopsis>
 
@@ -1612,6 +1614,13 @@
           updated, the original is saved in a .bak file in the same
           directory.</para>
 
+          <para>The -i option was added in Shorewall 4.6.0. When this option
+          is specified, the compiler will walk through the directories in the
+          CONFIG_PATH replacing alternative column specifications following a
+          semicolon (";") to alternate column specifications enclosed in curly
+          braces ("{...}"). When a file is updated, the original is saved in a
+          .bak file in the same directory.</para>
+
           <para>For a description of the other options, see the <emphasis
           role="bold">check</emphasis> command above.</para>
         </listitem>