diff --git a/zapret/def-cfg.sh b/zapret/def-cfg.sh
index 4e52cfa..99f9d42 100755
--- a/zapret/def-cfg.sh
+++ b/zapret/def-cfg.sh
@@ -4,7 +4,7 @@
 function set_cfg_reset_values
 {
 	local cfgname=${1:-$ZAPRET_CFG_NAME}
-	local TAB="$( echo -n -e '\t' )"
+	local TAB="$( printf '\t' )"
 	uci batch <<-EOF
 		set $cfgname.config.run_on_boot='0'
 		# settings for zapret service
@@ -47,7 +47,7 @@ function set_cfg_reset_values
 function clear_nfqws_strat
 {
 	local cfgname=${1:-$ZAPRET_CFG_NAME}
-	local TAB="$( echo -n -e '\t' )"
+	local TAB="$( printf '\t' )"
 	uci batch <<-EOF
 		set $cfgname.config.MODE_FILTER='hostlist'
 		set $cfgname.config.NFQWS_PORTS_TCP='80,443'
@@ -61,7 +61,7 @@ function set_cfg_nfqws_strat
 {
 	local strat=${1:--}
 	local cfgname=${2:-$ZAPRET_CFG_NAME}
-	local TAB="$( echo -n -e '\t' )"
+	local TAB="$( printf '\t' )"
     
 	uci batch <<-EOF
 		set $cfgname.config.MODE_FILTER='hostlist'
diff --git a/zapret/sync_config.sh b/zapret/sync_config.sh
index b9dd023..2fa37f5 100755
--- a/zapret/sync_config.sh
+++ b/zapret/sync_config.sh
@@ -46,7 +46,7 @@ function sync_param
 	local value="$( uci -q get $ZAPRET_CFG_SEC.$param )"
 	uncomment_param $param
 	append_param $param
-	local TAB="$( echo -n -e '\t' )"
+	local TAB="$( printf '\t' )"
 	if [ "$value" = "$TAB" ]; then
 		value=""
 	fi