diff --git a/drivers/md/bitmap.h b/drivers/md/bitmap.h
index d15721a..5df35ca 100644
--- a/drivers/md/bitmap.h
+++ b/drivers/md/bitmap.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * bitmap.h: Copyright (C) Peter T. Breuer (ptb@ot.uc3m.es) 2003
  *