diff --git a/core/dex_preopt_config.mk b/core/dex_preopt_config.mk
index 64ad8d9..c6c6a61 100644
--- a/core/dex_preopt_config.mk
+++ b/core/dex_preopt_config.mk
@@ -97,6 +97,7 @@
   $(call add_json_list, ProductUpdatableBootLocations,      $(PRODUCT_UPDATABLE_BOOT_LOCATIONS))
   $(call add_json_list, SystemServerJars,                   $(PRODUCT_SYSTEM_SERVER_JARS))
   $(call add_json_list, SystemServerApps,                   $(PRODUCT_SYSTEM_SERVER_APPS))
+  $(call add_json_list, UpdatableSystemServerJars,          $(PRODUCT_UPDATABLE_SYSTEM_SERVER_JARS))
   $(call add_json_list, SpeedApps,                          $(PRODUCT_DEXPREOPT_SPEED_APPS))
   $(call add_json_list, PreoptFlags,                        $(PRODUCT_DEX_PREOPT_DEFAULT_FLAGS))
   $(call add_json_str,  DefaultCompilerFilter,              $(PRODUCT_DEX_PREOPT_DEFAULT_COMPILER_FILTER))
diff --git a/core/product.mk b/core/product.mk
index 102e6a5..f451706 100644
--- a/core/product.mk
+++ b/core/product.mk
@@ -228,6 +228,8 @@
 _product_list_vars += PRODUCT_VENDOR_PROPERTY_BLACKLIST
 _product_list_vars += PRODUCT_SYSTEM_SERVER_APPS
 _product_list_vars += PRODUCT_SYSTEM_SERVER_JARS
+# List of system_server jars delivered via apex. Format = <apex name>:<jar name>.
+_product_list_vars += PRODUCT_UPDATABLE_SYSTEM_SERVER_JARS
 
 # All of the apps that we force preopt, this overrides WITH_DEXPREOPT.
 _product_list_vars += PRODUCT_ALWAYS_PREOPT_EXTRACTED_APK
diff --git a/target/product/media_system.mk b/target/product/media_system.mk
index 5c0902d..c2c9762 100644
--- a/target/product/media_system.mk
+++ b/target/product/media_system.mk
@@ -56,6 +56,11 @@
     wifi-service \
     com.android.location.provider \
 
+# system server jars which are updated via apex modules.
+# The values should be of the format <apex name>:<jar name>
+PRODUCT_UPDATABLE_SYSTEM_SERVER_JARS := \
+    # Ex: com.android.wifi:wifi-service
+
 PRODUCT_COPY_FILES += \
     system/core/rootdir/etc/public.libraries.android.txt:system/etc/public.libraries.txt