diff --git a/Shorewall/manpages/shorewall-actions.xml b/Shorewall/manpages/shorewall-actions.xml
index 45aac54ae..3642a1230 100644
--- a/Shorewall/manpages/shorewall-actions.xml
+++ b/Shorewall/manpages/shorewall-actions.xml
@@ -71,11 +71,11 @@
 
                     <member>DropSmurfs</member>
 
-                    <member>Invalid</member>
+                    <member>Invalid (Prior to Shorewall 4.5.13)</member>
 
-                    <member>NotSyn</member>
+                    <member>NotSyn (Prior to Shorewall 4.5.13)</member>
 
-                    <member>RST</member>
+                    <member>RST (Prior to Shorewall 4.5.13)</member>
 
                     <member>TCPFlags</member>
                   </simplelist>
diff --git a/Shorewall6/manpages/shorewall6-actions.xml b/Shorewall6/manpages/shorewall6-actions.xml
index 2dc65d0ff..3250a9eb8 100644
--- a/Shorewall6/manpages/shorewall6-actions.xml
+++ b/Shorewall6/manpages/shorewall6-actions.xml
@@ -71,11 +71,11 @@
 
                     <member>DropSmurfs</member>
 
-                    <member>Invalid</member>
+                    <member>Invalid (Prior to Shorewall 4.5.13)</member>
 
-                    <member>NotSyn</member>
+                    <member>NotSyn (Prior to Shorewall 4.5.13)</member>
 
-                    <member>RST</member>
+                    <member>RST (Prior to Shorewall 4.5.13)</member>
 
                     <member>TCPFlags</member>
                   </simplelist>