diff --git a/fs/udf/udf_sb.h b/fs/udf/udf_sb.h
index 5f027227f085464d33b2434a1cad64a44195c54d..8d1c9d4f439ee83395e7114e19248750f688fbf5 100644
--- a/fs/udf/udf_sb.h
+++ b/fs/udf/udf_sb.h
@@ -82,7 +82,7 @@ struct udf_virtual_data {
 struct udf_bitmap {
 	__u32			s_extLength;
 	__u32			s_extPosition;
-	__u16			s_nr_groups;
+	int			s_nr_groups;
 	struct buffer_head 	**s_block_bitmap;
 };