diff --git a/package/network/services/dnsmasq/files/dnsmasq.init b/package/network/services/dnsmasq/files/dnsmasq.init
index 44e7d2d4f9..c4c262ad69 100644
--- a/package/network/services/dnsmasq/files/dnsmasq.init
+++ b/package/network/services/dnsmasq/files/dnsmasq.init
@@ -161,7 +161,7 @@ append_server() {
 }
 
 append_rev_server() {
-        xappend "--rev-server=$1"
+	xappend "--rev-server=$1"
 }
 
 append_address() {
@@ -878,8 +878,16 @@ dnsmasq_start()
 	append_bool "$cfg" noresolv "--no-resolv"
 	append_bool "$cfg" localise_queries "--localise-queries"
 	append_bool "$cfg" readethers "--read-ethers"
-	append_bool "$cfg" dbus "--enable-dbus"
-	append_bool "$cfg" ubus "--enable-ubus"	1
+
+	local instance_name="dnsmasq.$cfg"
+	if [ "$cfg" = "$DEFAULT_INSTANCE" ]; then
+		instance_name="dnsmasq"
+	fi
+	config_get_bool dbus "$cfg" "dbus" 0
+	[ $dbus -gt 0 ] && xappend "--enable-dbus=uk.org.thekelleys.$instance_name"
+	config_get_bool ubus "$cfg" "ubus" 1
+	[ $ubus -gt 0 ] && xappend "--enable-ubus=$instance_name"
+
 	append_bool "$cfg" expandhosts "--expand-hosts"
 	config_get tftp_root "$cfg" "tftp_root"
 	[ -n "$tftp_root" ] && mkdir -p "$tftp_root" && append_bool "$cfg" enable_tftp "--enable-tftp"
@@ -1160,6 +1168,7 @@ boot()
 start_service() {
 	local instance="$1"
 	local instance_found=0
+	local first_instance=""
 
 	. /lib/functions/network.sh
 
@@ -1170,10 +1179,27 @@ start_service() {
 			if [ -n "$instance" ] && [ "$instance" = "$name" ]; then
 				instance_found=1
 			fi
+			if [ -z "$DEFAULT_INSTANCE" ]; then
+				local disabled
+				config_get_bool disabled "$name" disabled 0
+				if [ "$disabled" -eq 0 ]; then
+					# First enabled section will be assigned default instance name.
+					# Unnamed sections get precedence over named sections.
+					if expr "$cfg" : 'cfg[0-9a-f]*$' >/dev/null = "9"; then # See uci_fixup_section.
+						DEFAULT_INSTANCE="$name" # Unnamed config section.
+					elif [ -z "$first_instance" ]; then
+						first_instance="$name"
+					fi
+				fi
+			fi
 		fi
 	}
 
+	DEFAULT_INSTANCE=""
 	config_load dhcp
+	if [ -z "$DEFAULT_INSTANCE" ]; then
+		DEFAULT_INSTANCE="$first_instance" # No unnamed config section was found.
+	fi
 
 	if [ -n "$instance" ]; then
 		[ "$instance_found" -gt 0 ] || return