diff --git a/futility/updater_archive.c b/futility/updater_archive.c
index 9a1bb05..0a3ed50 100644
--- a/futility/updater_archive.c
+++ b/futility/updater_archive.c
@@ -813,8 +813,26 @@
 		if (strcmp(model_name, manifest->models[i].name) == 0)
 			model = &manifest->models[i];
 	}
-	if (!model)
-		ERROR("Model '%s' is not defined in manifest.", model_name);
+	if (!model) {
+		if (!*model_name)
+			ERROR("Cannot get model name.");
+		else
+			ERROR("Unsupported model: '%s'.", model_name);
+
+		fprintf(stderr,
+			"You are probably running an image for wrong board, or "
+			"a device in early stage that 'mosys' command is not "
+			"ready, or image from old (or factory) branches that "
+			"Unified Build config is not updated yet for 'mosys'.\n"
+			"Please check command 'mosys platform model', "
+			"which should output one of the supported models below:"
+			"\n");
+
+		for (i = 0; i < manifest->num; i++)
+			fprintf(stderr, " %s", manifest->models[i].name);
+		fprintf(stderr, "\n");
+	}
+
 
 	free(sys_model_name);
 	return model;
diff --git a/tests/futility/test_update.sh b/tests/futility/test_update.sh
index 294517d..03743f9 100755
--- a/tests/futility/test_update.sh
+++ b/tests/futility/test_update.sh
@@ -378,7 +378,7 @@
 	"${FROM_IMAGE}.ap" "${PEPPY_BIOS}" \
 	-a "${A}" --wp=0 --sys_props 0,0x10001,1,3 --model=peppy
 test_update "Full update (--archive, model=unknown)" \
-	"${FROM_IMAGE}.ap" "!Model 'unknown' is not defined" \
+	"${FROM_IMAGE}.ap" "!Unsupported model: 'unknown'" \
 	-a "${A}" --wp=0 --sys_props 0,0x10001,1,3 --model=unknown
 test_update "Full update (--archive, model=whitetip, signature_id=WL)" \
 	"${FROM_IMAGE}.al" "${LINK_BIOS}" \