diff --git a/setup/so-functions b/setup/so-functions
index 68d4ed01f..9dd6bc1e7 100755
--- a/setup/so-functions
+++ b/setup/so-functions
@@ -751,7 +751,7 @@ check_sos_appliance() {
 }
 
 compare_main_nic_ip() {
-	if [[ "$MNIC" =~ tun || "$MNIC" =~ wg || "$MNIC" =~ vpn ]]; then
+	if [[ "$MNIC" =~ ^('tun'|'vpn'|'wg')$ ]]; then
 	echo "This is a VPN"
 	else
 	  if [[ "$MAINIP" != "$MNIC_IP" ]]; then