diff --git a/omr-quota/files/etc/init.d/omr-quota b/omr-quota/files/etc/init.d/omr-quota
index 1b7cad1e2..4883fe645 100755
--- a/omr-quota/files/etc/init.d/omr-quota
+++ b/omr-quota/files/etc/init.d/omr-quota
@@ -21,7 +21,7 @@ _launch_quota() {
 	interface=$1
 
 	[ -z "$txquota" ] && [ -z "$rxquota" ] && [ -z "$ttquota" ] && return
-	[ $enabled = 0 ] && return
+	[ "$enabled" = "0" ] && return
 
 	[ "$(uci get vnstat.@vnstat[-1].interface | grep $interface)" = "" ] && {
 		uci -q batch <<-EOF
diff --git a/omr-tracker/files/etc/init.d/omr-tracker b/omr-tracker/files/etc/init.d/omr-tracker
index 984b17d80..6e00cf787 100755
--- a/omr-tracker/files/etc/init.d/omr-tracker
+++ b/omr-tracker/files/etc/init.d/omr-tracker
@@ -46,7 +46,7 @@ _launch_tracker() {
 	config_get gateway "$1" gateway
 
 	[ -z "$ifname" ] || [ -z "$multipath" ] || [ "$multipath" = "off" ] && [ "$1" != "glorytun" ] && return
-	[ $enabled = 0 ] && return
+	[ "${enabled}" = "0" ] && return
 
 	procd_open_instance
 	# shellcheck disable=SC2086
@@ -103,8 +103,8 @@ _launch_shadowsocks_tracker() {
 	local disabled
 	config_get disabled "$1" disabled 0
 
-	[ $enabled = 0 ] && return
-	[ $disabled = 1 ] && return
+	[ "$enabled" = "0" ] && return
+	[ "$disabled" = "1" ] && return
 
 	procd_open_instance
 	# shellcheck disable=SC2086