diff --git a/core/Makefile b/core/Makefile
index 7fed968..4cbf8a9 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -110,7 +110,8 @@
 endif
 ALL_DEFAULT_INSTALLED_MODULES += $(INSTALLED_DEFAULT_PROP_TARGET)
 FINAL_DEFAULT_PROPERTIES := \
-    $(call collapse-pairs, $(ADDITIONAL_DEFAULT_PROPERTIES))
+    $(call collapse-pairs, $(ADDITIONAL_DEFAULT_PROPERTIES)) \
+    $(call collapse-pairs, $(PRODUCT_SYSTEM_DEFAULT_PROPERTIES))
 ifndef property_overrides_split_enabled
   FINAL_DEFAULT_PROPERTIES += \
       $(call collapse-pairs, $(PRODUCT_DEFAULT_PROPERTY_OVERRIDES))
diff --git a/core/product-graph.mk b/core/product-graph.mk
index 633ac37..268688a 100644
--- a/core/product-graph.mk
+++ b/core/product-graph.mk
@@ -103,6 +103,7 @@
 	$(hide) echo 'PRODUCT_MANUFACTURER=$$(PRODUCTS.$(strip $(1)).PRODUCT_MANUFACTURER)' >> $$@
 	$(hide) echo 'PRODUCT_PROPERTY_OVERRIDES=$$(PRODUCTS.$(strip $(1)).PRODUCT_PROPERTY_OVERRIDES)' >> $$@
 	$(hide) echo 'PRODUCT_DEFAULT_PROPERTY_OVERRIDES=$$(PRODUCTS.$(strip $(1)).PRODUCT_DEFAULT_PROPERTY_OVERRIDES)' >> $$@
+	$(hide) echo 'PRODUCT_SYSTEM_DEFAULT_PROPERTIES=$$(PRODUCTS.$(strip $(1)).PRODUCT_SYSTEM_DEFAULT_PROPERTIES)' >> $$@
 	$(hide) echo 'PRODUCT_CHARACTERISTICS=$$(PRODUCTS.$(strip $(1)).PRODUCT_CHARACTERISTICS)' >> $$@
 	$(hide) echo 'PRODUCT_COPY_FILES=$$(PRODUCTS.$(strip $(1)).PRODUCT_COPY_FILES)' >> $$@
 	$(hide) echo 'PRODUCT_OTA_PUBLIC_KEYS=$$(PRODUCTS.$(strip $(1)).PRODUCT_OTA_PUBLIC_KEYS)' >> $$@
diff --git a/core/product.mk b/core/product.mk
index 1819293..1541cff 100644
--- a/core/product.mk
+++ b/core/product.mk
@@ -112,6 +112,7 @@
     PRODUCT_SUPPORTS_VERITY \
     PRODUCT_SUPPORTS_VERITY_FEC \
     PRODUCT_OEM_PROPERTIES \
+    PRODUCT_SYSTEM_DEFAULT_PROPERTIES \
     PRODUCT_SYSTEM_PROPERTY_BLACKLIST \
     PRODUCT_SYSTEM_SERVER_APPS \
     PRODUCT_SYSTEM_SERVER_JARS \
diff --git a/core/product_config.mk b/core/product_config.mk
index 777c29d..ff56c0e 100644
--- a/core/product_config.mk
+++ b/core/product_config.mk
@@ -358,6 +358,13 @@
     $(strip $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_DEFAULT_PROPERTY_OVERRIDES))
 .KATI_READONLY := PRODUCT_DEFAULT_PROPERTY_OVERRIDES
 
+# A list of property assignments, like "key = value", with zero or more
+# whitespace characters on either side of the '='.
+# used for adding properties to default.prop of system partition
+PRODUCT_SYSTEM_DEFAULT_PROPERTIES := \
+    $(strip $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SYSTEM_DEFAULT_PROPERTIES))
+.KATI_READONLY := PRODUCT_SYSTEM_DEFAULT_PROPERTIES
+
 # Should we use the default resources or add any product specific overlays
 PRODUCT_PACKAGE_OVERLAYS := \
     $(strip $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_PACKAGE_OVERLAYS))