diff --git a/libcutils/include/private/android_filesystem_config.h b/libcutils/include/private/android_filesystem_config.h
index ff6b036e6..a2d36ff7b 100644
--- a/libcutils/include/private/android_filesystem_config.h
+++ b/libcutils/include/private/android_filesystem_config.h
@@ -131,6 +131,8 @@
 #define AID_FSVERITY_CERT 1075   /* fs-verity key ownership in keystore */
 #define AID_CREDSTORE 1076       /* identity credential manager service */
 #define AID_EXTERNAL_STORAGE 1077 /* Full external storage access including USB OTG volumes */
+#define AID_EXT_DATA_RW 1078      /* GID for app-private data directories on external storage */
+#define AID_EXT_OBB_RW 1079       /* GID for OBB directories on external storage */
 /* Changes to this file must be made in AOSP, *not* in internal branches. */
 
 #define AID_SHELL 2000 /* adb and debug shell user */