diff --git a/core/Makefile b/core/Makefile
index 7466889..ea25cb2 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -2524,7 +2524,7 @@
 $(INSTALLED_TEST_HARNESS_RAMDISK_TARGET): $(INSTALLED_DEBUG_RAMDISK_TARGET)
 $(INSTALLED_TEST_HARNESS_RAMDISK_TARGET): $(MKBOOTFS) $(INTERNAL_TEST_HARNESS_RAMDISK_FILES) | $(COMPRESSION_COMMAND_DEPS)
 	$(call pretty,"Target test harness ramdisk: $@")
-	rsync -a $(TEST_HARNESS_RAMDISK_SYNC_DIR)/ $(TEST_HARNESS_RAMDISK_ROOT_DIR)
+	rsync --chmod=u+w -a $(TEST_HARNESS_RAMDISK_SYNC_DIR)/ $(TEST_HARNESS_RAMDISK_ROOT_DIR)
 	$(call append-test-harness-props,$(ADDITIONAL_TEST_HARNESS_PROPERTIES),$(TEST_HARNESS_PROP_TARGET))
 	$(MKBOOTFS) -d $(TARGET_OUT) $(TEST_HARNESS_RAMDISK_ROOT_DIR) | $(COMPRESSION_COMMAND) > $@