diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
index 28705ae..07ee73c 100644
--- a/include/uapi/linux/bpf.h
+++ b/include/uapi/linux/bpf.h
@@ -1506,7 +1506,7 @@ union bpf_attr {
 		__s32	map_token_fd;
 	};
 
-	struct { /* anonymous struct used by BPF_MAP_*_ELEM commands */
+	struct { /* anonymous struct used by BPF_MAP_*_ELEM and BPF_MAP_FREEZE commands */
 		__u32		map_fd;
 		__aligned_u64	key;
 		union {