diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
index fff6cdb..beac5cd 100644
--- a/include/uapi/linux/bpf.h
+++ b/include/uapi/linux/bpf.h
@@ -1207,6 +1207,7 @@ enum bpf_perf_event_type {
 #define BPF_F_BEFORE		(1U << 3)
 #define BPF_F_AFTER		(1U << 4)
 #define BPF_F_ID		(1U << 5)
+#define BPF_F_PREORDER		(1U << 6)
 #define BPF_F_LINK		BPF_F_LINK /* 1 << 13 */
 
 /* If BPF_F_STRICT_ALIGNMENT is used in BPF_PROG_LOAD command, the