diff --git a/wireguard-install.sh b/wireguard-install.sh
index 72feb1f..2e1da3a 100644
--- a/wireguard-install.sh
+++ b/wireguard-install.sh
@@ -126,7 +126,7 @@ Address = $SERVER_WG_IPV4/24,$SERVER_WG_IPV6/64
 ListenPort = $SERVER_PORT
 PrivateKey = $SERVER_PRIV_KEY" > "/etc/wireguard/$SERVER_WG_NIC.conf"
 
-if [[ "$OS" = 'fedora' ]]; then
+if [ -x "$(command -v firewall-cmd)" ]; then
     FIREWALLD_IPV4_ADDRESS=$(echo $SERVER_WG_IPV4 | cut -d"." -f1-3)".0"
     FIREWALLD_IPV6_ADDRESS=$(echo $SERVER_WG_IPV6 | sed 's/:[^:]*$/:0/')
     echo "PostUp = firewall-cmd --add-port $SERVER_PORT/udp && firewall-cmd --add-rich-rule='rule family=ipv4 source address=$FIREWALLD_IPV4_ADDRESS/24 masquerade' && firewall-cmd --add-rich-rule='rule family=ipv6 source address=$FIREWALLD_IPV6_ADDRESS/24 masquerade'