diff --git a/androidmk/cmd/androidmk/androidmk_test.go b/androidmk/cmd/androidmk/androidmk_test.go
index 2eab0cc..4d5180e 100644
--- a/androidmk/cmd/androidmk/androidmk_test.go
+++ b/androidmk/cmd/androidmk/androidmk_test.go
@@ -1179,6 +1179,84 @@
 `,
 	},
 	{
+		desc: "prebuilt_firmware subdir_bar in $(TARGET_OUT_ETC)",
+		in: `
+include $(CLEAR_VARS)
+LOCAL_MODULE := foo
+LOCAL_MODULE_CLASS := ETC
+LOCAL_MODULE_PATH := $(TARGET_OUT_ETC)/firmware/bar
+LOCAL_SRC_FILES := foo.fw
+include $(BUILD_PREBUILT)
+`,
+		expected: `
+prebuilt_firmware {
+	name: "foo",
+
+	src: "foo.fw",
+	sub_dir: "bar",
+}
+`,
+	},
+	{
+		desc: "prebuilt_firmware subdir_bar in $(TARGET_OUT)",
+		in: `
+include $(CLEAR_VARS)
+LOCAL_MODULE := foo
+LOCAL_MODULE_CLASS := ETC
+LOCAL_MODULE_PATH := $(TARGET_OUT)/etc/firmware/bar
+LOCAL_SRC_FILES := foo.fw
+include $(BUILD_PREBUILT)
+`,
+		expected: `
+prebuilt_firmware {
+	name: "foo",
+
+	src: "foo.fw",
+	sub_dir: "bar",
+}
+`,
+	},
+	{
+		desc: "prebuilt_firmware subdir_bar in $(TARGET_OUT_VENDOR)",
+		in: `
+include $(CLEAR_VARS)
+LOCAL_MODULE := foo
+LOCAL_MODULE_CLASS := ETC
+LOCAL_MODULE_PATH := $(TARGET_OUT_VENDOR)/firmware/bar
+LOCAL_SRC_FILES := foo.fw
+include $(BUILD_PREBUILT)
+`,
+		expected: `
+prebuilt_firmware {
+	name: "foo",
+
+	src: "foo.fw",
+	sub_dir: "bar",
+	proprietary: true,
+}
+`,
+	},
+	{
+		desc: "prebuilt_firmware subdir_bar in $(TARGET_OUT)/vendor",
+		in: `
+include $(CLEAR_VARS)
+LOCAL_MODULE := foo
+LOCAL_MODULE_CLASS := ETC
+LOCAL_MODULE_PATH := $(TARGET_OUT)/vendor/firmware/bar
+LOCAL_SRC_FILES := foo.fw
+include $(BUILD_PREBUILT)
+`,
+		expected: `
+prebuilt_firmware {
+	name: "foo",
+
+	src: "foo.fw",
+	sub_dir: "bar",
+	proprietary: true,
+}
+`,
+	},
+	{
 		desc: "vts_config",
 		in: `
 include $(CLEAR_VARS)
diff --git a/bpfix/bpfix/bpfix.go b/bpfix/bpfix/bpfix.go
index 17cff18..cac4d9a 100644
--- a/bpfix/bpfix/bpfix.go
+++ b/bpfix/bpfix/bpfix.go
@@ -503,16 +503,18 @@
 }
 
 var localModuleUpdate = map[string][]etcPrebuiltModuleUpdate{
-	"HOST_OUT":                        {{prefix: "/etc", modType: "prebuilt_etc_host"}, {prefix: "/usr/share", modType: "prebuilt_usr_share_host"}},
-	"PRODUCT_OUT":                     {{prefix: "/system/etc"}, {prefix: "/vendor/etc", flags: []string{"proprietary"}}},
-	"TARGET_OUT":                      {{prefix: "/etc"}, {prefix: "/usr/share", modType: "prebuilt_usr_share"}, {prefix: "/fonts", modType: "prebuilt_font"}},
-	"TARGET_OUT_ETC":                  {{prefix: ""}},
+	"HOST_OUT":    {{prefix: "/etc", modType: "prebuilt_etc_host"}, {prefix: "/usr/share", modType: "prebuilt_usr_share_host"}},
+	"PRODUCT_OUT": {{prefix: "/system/etc"}, {prefix: "/vendor/etc", flags: []string{"proprietary"}}},
+	"TARGET_OUT": {{prefix: "/usr/share", modType: "prebuilt_usr_share"}, {prefix: "/fonts", modType: "prebuilt_font"},
+		{prefix: "/etc/firmware", modType: "prebuilt_firmware"}, {prefix: "/vendor/firmware", modType: "prebuilt_firmware", flags: []string{"proprietary"}},
+		{prefix: "/etc"}},
+	"TARGET_OUT_ETC":                  {{prefix: "/firmware", modType: "prebuilt_firmware"}, {prefix: ""}},
 	"TARGET_OUT_PRODUCT":              {{prefix: "/etc", flags: []string{"product_specific"}}, {prefix: "/fonts", modType: "prebuilt_font", flags: []string{"product_specific"}}},
 	"TARGET_OUT_PRODUCT_ETC":          {{prefix: "", flags: []string{"product_specific"}}},
 	"TARGET_OUT_ODM":                  {{prefix: "/etc", flags: []string{"device_specific"}}},
 	"TARGET_OUT_PRODUCT_SERVICES":     {{prefix: "/etc", flags: []string{"product_services_specific"}}},
 	"TARGET_OUT_PRODUCT_SERVICES_ETC": {{prefix: "", flags: []string{"product_services_specific"}}},
-	"TARGET_OUT_VENDOR":               {{prefix: "/etc", flags: []string{"proprietary"}}},
+	"TARGET_OUT_VENDOR":               {{prefix: "/etc", flags: []string{"proprietary"}}, {prefix: "/firmware", modType: "prebuilt_firmware", flags: []string{"proprietary"}}},
 	"TARGET_OUT_VENDOR_ETC":           {{prefix: "", flags: []string{"proprietary"}}},
 	"TARGET_RECOVERY_ROOT_OUT":        {{prefix: "/system/etc", flags: []string{"recovery"}}},
 }