diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
index faa304c..c969930 100644
--- a/include/uapi/linux/bpf.h
+++ b/include/uapi/linux/bpf.h
@@ -5329,6 +5329,11 @@ union bpf_attr {
  *		*flags* must be 0 except for skb-type dynptrs.
  *
  *		For skb-type dynptrs:
+ *		    *  All data slices of the dynptr are automatically
+ *		       invalidated after **bpf_dynptr_write**\ (). This is
+ *		       because writing may pull the skb and change the
+ *		       underlying packet buffer.
+ *
  *		    *  For *flags*, please see the flags accepted by
  *		       **bpf_skb_store_bytes**\ ().
  *	Return