diff --git a/core/android_soong_config_vars.mk b/core/android_soong_config_vars.mk
index a81d168..ab87e8f 100644
--- a/core/android_soong_config_vars.mk
+++ b/core/android_soong_config_vars.mk
@@ -198,7 +198,13 @@
 else
   SYSTEM_OPTIMIZE_JAVA ?= true
 endif
+
+ifeq (true,$(FULL_SYSTEM_OPTIMIZE_JAVA))
+  SYSTEM_OPTIMIZE_JAVA := true
+endif
+
 $(call add_soong_config_var,ANDROID,SYSTEM_OPTIMIZE_JAVA)
+$(call add_soong_config_var,ANDROID,FULL_SYSTEM_OPTIMIZE_JAVA)
 
 # Check for SupplementalApi module.
 ifeq ($(wildcard packages/modules/SupplementalApi),)
diff --git a/core/config.mk b/core/config.mk
index 196f07c..7006e54 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -1308,3 +1308,9 @@
 .KATI_READONLY := DEFAULT_DATA_OUT_MODULES
 
 include $(BUILD_SYSTEM)/dumpvar.mk
+
+ifeq (true,$(FULL_SYSTEM_OPTIMIZE_JAVA))
+ifeq (false,$(SYSTEM_OPTIMIZE_JAVA))
+$(error SYSTEM_OPTIMIZE_JAVA must be enabled when FULL_SYSTEM_OPTIMIZE_JAVA is enabled)
+endif
+endif