diff --git a/build/soong/android/variable.go b/build/soong/android/variable.go
index b5ffc65..a3ce7f6 100644
--- a/build/soong/android/variable.go
+++ b/build/soong/android/variable.go
@@ -14,6 +14,9 @@
 	Supports_hw_fde_perf struct {
 		Cflags []string
 	}
+	Supports_legacy_hw_fde struct {
+		Cflags []string
+	}
 	Target_process_sdk_version_override struct {
 		Cppflags []string
 	}
@@ -42,6 +45,7 @@
 	Specific_camera_parameter_library  *string `json:",omitempty"`
 	Supports_hw_fde  *bool `json:",omitempty"`
 	Supports_hw_fde_perf  *bool `json:",omitempty"`
+	Supports_legacy_hw_fde  *bool `json:",omitempty"`
 	Target_process_sdk_version_override *string `json:",omitempty"`
 	Target_shim_libs  *string `json:",omitempty"`
 	Uses_generic_camera_parameter_library  *bool `json:",omitempty"`
diff --git a/build/soong/soong_config.mk b/build/soong/soong_config.mk
index 4f350ca..4083edf 100644
--- a/build/soong/soong_config.mk
+++ b/build/soong/soong_config.mk
@@ -9,6 +9,7 @@
 $(call add_json_str, Specific_camera_parameter_library, $(TARGET_SPECIFIC_CAMERA_PARAMETER_LIBRARY))
 $(call add_json_bool, Supports_hw_fde, $(filter true,$(TARGET_HW_DISK_ENCRYPTION)))
 $(call add_json_bool, Supports_hw_fde_perf, $(filter true,$(TARGET_HW_DISK_ENCRYPTION_PERF)))
+$(call add_json_bool, Supports_legacy_hw_fde, $(filter true,$(TARGET_LEGACY_HW_DISK_ENCRYPTION)))
 $(call add_json_str_omitempty, Target_process_sdk_version_override, $(TARGET_PROCESS_SDK_VERSION_OVERRIDE))
 $(call add_json_str_omitempty, Target_shim_libs, $(TARGET_LD_SHIM_LIBS))
 $(call add_json_bool, Uses_generic_camera_parameter_library, $(if $(TARGET_SPECIFIC_CAMERA_PARAMETER_LIBRARY),,true))