diff --git a/manpages/shorewall-interfaces.xml b/manpages/shorewall-interfaces.xml
index 9b0dfcb87..3818b5068 100644
--- a/manpages/shorewall-interfaces.xml
+++ b/manpages/shorewall-interfaces.xml
@@ -73,7 +73,9 @@ loc     eth2            -</programlisting>
           <para>You may use wildcards here by specifying a prefix followed by
           the plus sign ("+"). For example, if you want to make an entry that
           applies to all PPP interfaces, use 'ppp+'; that would match ppp0,
-          ppp1, ppp2, …</para>
+          ppp1, ppp2, … Please note that the '+' means '<emphasis
+          role="bold">one</emphasis> or more additional characters' so 'ppp'
+          does not match 'ppp+'.</para>
 
           <para>When using Shorewall versions before 4.1.4, care must be
           exercised when using wildcards where there is another zone that uses
diff --git a/manpages6/shorewall6-interfaces.xml b/manpages6/shorewall6-interfaces.xml
index 95537da40..6345b3d1d 100644
--- a/manpages6/shorewall6-interfaces.xml
+++ b/manpages6/shorewall6-interfaces.xml
@@ -73,7 +73,9 @@ loc     eth2            -</programlisting>
           <para>You may use wildcards here by specifying a prefix followed by
           the plus sign ("+"). For example, if you want to make an entry that
           applies to all PPP interfaces, use 'ppp+'; that would match ppp0,
-          ppp1, ppp2, …</para>
+          ppp1, ppp2, …Please note that the '+' means '<emphasis
+          role="bold">one</emphasis> or more additional characters' so 'ppp'
+          does not match 'ppp+'.</para>
 
           <para>Care must be exercised when using wildcards where there is
           another zone that uses a matching specific interface. See <ulink