diff --git a/libcutils/include/private/android_filesystem_config.h b/libcutils/include/private/android_filesystem_config.h
index 07236120e..03edfb5dd 100644
--- a/libcutils/include/private/android_filesystem_config.h
+++ b/libcutils/include/private/android_filesystem_config.h
@@ -190,7 +190,8 @@
  */
 #define AID_OVERFLOWUID 65534 /* unmapped user in the user namespace */
 
-#define AID_ISOLATED_START 99000 /* start of uids for fully isolated sandboxed processes */
+/* use the ranges below to determine whether a process is isolated */
+#define AID_ISOLATED_START 90000 /* start of uids for fully isolated sandboxed processes */
 #define AID_ISOLATED_END 99999   /* end of uids for fully isolated sandboxed processes */
 
 #define AID_USER 100000        /* TODO: switch users over to AID_USER_OFFSET */