diff --git a/db845c/device.mk b/db845c/device.mk
index 63e24a1..ef754c1 100644
--- a/db845c/device.mk
+++ b/db845c/device.mk
@@ -25,7 +25,7 @@
 endif
 
 # Build generic Audio HAL
-PRODUCT_PACKAGES := audio.primary.db845c
+PRODUCT_PACKAGES += audio.primary.db845c
 
 # BootControl HAL
 PRODUCT_PACKAGES += \
diff --git a/full.mk b/full.mk
index 5083db4..f2955ec 100644
--- a/full.mk
+++ b/full.mk
@@ -29,7 +29,7 @@
 $(call inherit-product, $(SRC_TARGET_DIR)/product/emulated_storage.mk)
 
 # vndk
-PRODUCT_PACKAGES := vndk-sp
+PRODUCT_PACKAGES += vndk-sp
 
 # HACK: Avoid usb crash
 PRODUCT_PRODUCT_PROPERTIES := \
diff --git a/rb5/device.mk b/rb5/device.mk
index 8fc29a5..6f4f75a 100644
--- a/rb5/device.mk
+++ b/rb5/device.mk
@@ -25,7 +25,7 @@
     $(LOCAL_PATH)/mixer_paths.xml:$(TARGET_COPY_OUT_VENDOR)/etc/mixer_paths.xml \
 
 # Build generic Audio HAL
-PRODUCT_PACKAGES := audio.primary.rb5
+PRODUCT_PACKAGES += audio.primary.rb5
 
 # BootControl HAL
 PRODUCT_PACKAGES += \