diff --git a/src/debian/debian_dns_smartdns_plugin.conf b/src/debian/debian_dns_smartdns_plugin.conf
index 2eade88..35509c5 100644
--- a/src/debian/debian_dns_smartdns_plugin.conf
+++ b/src/debian/debian_dns_smartdns_plugin.conf
@@ -29,8 +29,8 @@ git clone --depth=1 https://gitee.com/felixonmars/dnsmasq-china-list.git "$WORKD
 #git clone --depth=1 http://repo.or.cz/dnsmasq-china-list.git "$WORKDIR"
 
 echo "Removing old configurations..."
-for _conf in "${CONF_WITH_SERVERS[@]}" "${CONF_WITH_GROUP[@]}" "${CONF_SIMPLE[@]}"; do
-  rm -f /etc/smartdns.d/"$_conf"*.conf
+for conf in "${CONF_WITH_SERVERS[@]}" "${CONF_WITH_GROUP[@]}" "${CONF_SIMPLE[@]}"; do
+  rm -f /etc/smartdns.d/"$conf"*.conf
 done
 
 echo "Installing new configurations..."