diff --git a/include/uapi/linux/btrfs.h b/include/uapi/linux/btrfs.h
index 9b576603b3f1..0a13baf3d8d1 100644
--- a/include/uapi/linux/btrfs.h
+++ b/include/uapi/linux/btrfs.h
@@ -598,7 +598,7 @@ struct btrfs_ioctl_search_args_v2 {
 	__u64 buf_size;		   /* in - size of buffer
 					    * out - on EOVERFLOW: needed size
 					    *       to store item */
-	__u64 buf[];                       /* out - found items */
+	__u8 buf[];                        /* out - found items */
 };
 
 /* With a @src_length of zero, the range from @src_offset->EOF is cloned! */