diff --git a/target/product/gsi_common.mk b/target/product/gsi_common.mk
index e87309b..fb0478d 100644
--- a/target/product/gsi_common.mk
+++ b/target/product/gsi_common.mk
@@ -24,12 +24,12 @@
 $(call inherit-product-if-exists, frameworks/base/data/sounds/AllAudio.mk)
 
 # Additional settings used in all AOSP builds
-PRODUCT_PROPERTY_OVERRIDES := \
+PRODUCT_PROPERTY_OVERRIDES += \
     ro.config.ringtone=Ring_Synth_04.ogg \
     ro.config.notification_sound=pixiedust.ogg
 
 # The mainline checking whitelist, should be clean up
-PRODUCT_ARTIFACT_PATH_REQUIREMENT_WHITELIST := \
+PRODUCT_ARTIFACT_PATH_REQUIREMENT_WHITELIST += \
     system/app/messaging/messaging.apk \
     system/app/PhotoTable/PhotoTable.apk \
     system/app/WAPPushManager/WAPPushManager.apk \