diff --git a/include/image-commands.mk b/include/image-commands.mk
index 9da712e733..7a370034c8 100644
--- a/include/image-commands.mk
+++ b/include/image-commands.mk
@@ -390,10 +390,13 @@ json_quote=$(subst ','\'',$(subst ",\",$(1)))
 metadata_devices=$(if $(1),$(subst "$(space)","$(comma)",$(strip $(foreach v,$(1),"$(call json_quote,$(v))"))))
 metadata_json = \
 	'{ $(if $(IMAGE_METADATA),$(IMAGE_METADATA)$(comma)) \
-		"metadata_version": "1.0", \
+		"metadata_version": "1.1", \
 		"compat_version": "$(call json_quote,$(compat_version))", \
 		$(if $(DEVICE_COMPAT_MESSAGE),"compat_message": "$(call json_quote,$(DEVICE_COMPAT_MESSAGE))"$(comma)) \
-		"supported_devices":[$(call metadata_devices,$(SUPPORTED_DEVICES))], \
+		$(if $(filter-out 1.0,$(compat_version)),"new_supported_devices":[$(call metadata_devices,$(SUPPORTED_DEVICES))]$(comma)) \
+		$(if $(filter-out 1.0,$(compat_version)),"supported_devices": \
+			["$(call json_quote,Image version $(compat_version) incompatible to device: $(if $(DEVICE_COMPAT_MESSAGE),$(DEVICE_COMPAT_MESSAGE),Please check documentation ...))"]$(comma)) \
+		$(if $(filter 1.0,$(compat_version)),"supported_devices":[$(call metadata_devices,$(SUPPORTED_DEVICES))]$(comma)) \
 		"version": { \
 			"dist": "$(call json_quote,$(VERSION_DIST))", \
 			"version": "$(call json_quote,$(VERSION_NUMBER))", \
diff --git a/package/base-files/files/lib/upgrade/fwtool.sh b/package/base-files/files/lib/upgrade/fwtool.sh
index e8277f6fcc..3a74c72bba 100644
--- a/package/base-files/files/lib/upgrade/fwtool.sh
+++ b/package/base-files/files/lib/upgrade/fwtool.sh
@@ -51,7 +51,12 @@ fwtool_check_image() {
 	json_get_var compatmessage compat_message
 	[ -n "$imagecompat" ] || imagecompat="1.0"
 
-	json_select supported_devices || return 1
+	# select correct supported list based on compat_version
+	# (using this ensures that compatibility check works for devices
+	#  not knowing about compat-version)
+	local supported=supported_devices
+	[ "$imagecompat" != "1.0" ] && supported=new_supported_devices
+	json_select $supported || return 1
 
 	json_get_keys dev_keys
 	for k in $dev_keys; do