diff --git a/include/private/android_filesystem_config.h b/include/private/android_filesystem_config.h
index 6232f7239..53966d598 100644
--- a/include/private/android_filesystem_config.h
+++ b/include/private/android_filesystem_config.h
@@ -91,6 +91,7 @@
 #define AID_CAMERASERVER  1047  /* cameraserver process */
 #define AID_FIREWALL      1048  /* firewalld process */
 #define AID_TRUNKS        1049  /* trunksd process (TPM daemon) */
+/* Changes to this file must be made in AOSP, *not* in internal branches. */
 
 #define AID_SHELL         2000  /* adb and debug shell user */
 #define AID_CACHE         2001  /* cache access */