diff --git a/include/linux/bpf.h b/include/linux/bpf.h
index 5f520f5..ca854e5 100644
--- a/include/linux/bpf.h
+++ b/include/linux/bpf.h
@@ -186,5 +186,6 @@
 extern const struct bpf_func_proto bpf_get_prandom_u32_proto;
 extern const struct bpf_func_proto bpf_get_smp_processor_id_proto;
 extern const struct bpf_func_proto bpf_tail_call_proto;
+extern const struct bpf_func_proto bpf_ktime_get_ns_proto;
 
 #endif /* _LINUX_BPF_H */