diff --git a/config/cfgroot/general-functions.pl b/config/cfgroot/general-functions.pl
index 4ed5a5520..35ae7c093 100644
--- a/config/cfgroot/general-functions.pl
+++ b/config/cfgroot/general-functions.pl
@@ -286,7 +286,7 @@ sub validip
 sub validmask {
 	my $mask = shift;
 
-	return &Network::check_netmask($mask) or &Network::check_prefix($mask);
+	return &Network::check_netmask($mask) || &Network::check_prefix($mask);
 }
 
 sub validipormask