diff --git a/config/cfgroot/network-functions.pl b/config/cfgroot/network-functions.pl
index 2902aabb0..93bb646a6 100644
--- a/config/cfgroot/network-functions.pl
+++ b/config/cfgroot/network-functions.pl
@@ -111,8 +111,9 @@ sub network_equal {
 	my @bin1 = &network2bin($network1);
 	my @bin2 = &network2bin($network2);
 
-	if (!defined $bin1 || !defined $bin2) {
-		return undef;
+   unless (scalar @bin1 == 2 &&
+	        scalar @bin2 == 2) {
+		return;
 	}
 
 	if ($bin1[0] eq $bin2[0] && $bin1[1] eq $bin2[1]) {