diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index f39d02e7f7efe1d191f48bc6452b55ca2c5b58a4..16f44bc481ab442740090bcc296e284b3492a0b8 100644
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -121,7 +121,7 @@ struct extent_buffer {
  */
 struct extent_changeset {
 	/* How many bytes are set/cleared in this operation */
-	unsigned int bytes_changed;
+	u64 bytes_changed;
 
 	/* Changed ranges */
 	struct ulist range_changed;