diff --git a/libc/kernel/uapi/linux/android/binder.h b/libc/kernel/uapi/linux/android/binder.h
index 52f4c6b..0d1f83d 100644
--- a/libc/kernel/uapi/linux/android/binder.h
+++ b/libc/kernel/uapi/linux/android/binder.h
@@ -221,6 +221,7 @@
   BR_FAILED_REPLY = _IO('r', 17),
   BR_FROZEN_REPLY = _IO('r', 18),
   BR_ONEWAY_SPAM_SUSPECT = _IO('r', 19),
+  BR_TRANSACTION_PENDING_FROZEN = _IO('r', 20),
 };
 enum binder_driver_command_protocol {
   BC_TRANSACTION = _IOW('c', 0, struct binder_transaction_data),