diff --git a/html/cgi-bin/firewall.cgi b/html/cgi-bin/firewall.cgi
index b313d4bb2..e7884ca27 100755
--- a/html/cgi-bin/firewall.cgi
+++ b/html/cgi-bin/firewall.cgi
@@ -1351,6 +1351,7 @@ sub getcolor
 			#Check if IP is part of a IPsec N2N network
 			foreach my $key (sort keys %ipsecconf){
 				my ($a,$b) = split("/",$ipsecconf{$key}[11]);
+				$b=&General::iporsubtodec($b);
 				if (&General::IpInSubnet($c,$a,$b)){
 					$tdcolor="style='background-color: $Header::colourvpn;color:white;'";
 					return;