diff --git a/core/Makefile b/core/Makefile
index b76a4f8..2fe8441 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -3582,8 +3582,19 @@
 ifeq ($(BOARD_AVB_ENABLE),true)
 $(BUILT_SYSTEMIMAGE): $(BOARD_AVB_SYSTEM_KEY_PATH)
 endif
+
+ifeq ($(USE_SOONG_DEFINED_SYSTEM_IMAGE),true)
+ifeq ($(PRODUCT_SOONG_DEFINED_SYSTEM_IMAGE),)
+$(error PRODUCT_SOONG_DEFINED_SYSTEM_IMAGE must be set if USE_SOONG_DEFINED_SYSTEM_IMAGE is true)
+endif
+soong_defined_system_image := $(call intermediates-dir-for,ETC,$(PRODUCT_SOONG_DEFINED_SYSTEM_IMAGE))/$(PRODUCT_SOONG_DEFINED_SYSTEM_IMAGE)
+$(BUILT_SYSTEMIMAGE): $(INSTALLED_FILES_FILE) $(systemimage_intermediates)/file_list.txt $(soong_defined_system_image)
+$(eval $(call copy-one-file, $(soong_defined_system_image), $(BUILT_SYSTEMIMAGE)))
+soong_defined_system_image :=
+else
 $(BUILT_SYSTEMIMAGE): $(FULL_SYSTEMIMAGE_DEPS) $(INSTALLED_FILES_FILE) $(systemimage_intermediates)/file_list.txt
 	$(call build-systemimage-target,$@)
+endif
 
 $(call declare-1p-container,$(BUILT_SYSTEMIMAGE),system/extras)
 $(call declare-container-license-deps,$(BUILT_SYSTEMIMAGE),$(FULL_SYSTEMIMAGE_DEPS),$(PRODUCT_OUT)/:/)