diff --git a/core/android_soong_config_vars.mk b/core/android_soong_config_vars.mk
index 95c0736..862fcb2 100644
--- a/core/android_soong_config_vars.mk
+++ b/core/android_soong_config_vars.mk
@@ -128,6 +128,8 @@
 
 ifdef PRODUCT_CGROUP_V2_SYS_APP_ISOLATION_ENABLED
 $(call add_soong_config_var_value,ANDROID,cgroup_v2_sys_app_isolation,$(PRODUCT_CGROUP_V2_SYS_APP_ISOLATION_ENABLED))
+else
+$(call add_soong_config_var_value,ANDROID,cgroup_v2_sys_app_isolation,true)
 endif
 
 $(call add_soong_config_var_value,ANDROID,release_avf_allow_preinstalled_apps,$(RELEASE_AVF_ALLOW_PREINSTALLED_APPS))