diff --git a/sys/fs/ext2fs/ext2_acl.c b/sys/fs/ext2fs/ext2_acl.c
index fdf71214cb4..a49c98cdb93 100644
--- a/sys/fs/ext2fs/ext2_acl.c
+++ b/sys/fs/ext2fs/ext2_acl.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
  * Copyright (c) 2017, Fedor Uporov
  * All rights reserved.
  *
diff --git a/sys/fs/ext2fs/ext2_acl.h b/sys/fs/ext2fs/ext2_acl.h
index abcb97d8517..523edfa734f 100644
--- a/sys/fs/ext2fs/ext2_acl.h
+++ b/sys/fs/ext2fs/ext2_acl.h
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
  * Copyright (c) 2017, Fedor Uporov
  * All rights reserved.
  *
diff --git a/sys/fs/ext2fs/ext2_csum.c b/sys/fs/ext2fs/ext2_csum.c
index e8abe478620..c30e6cbdbb9 100644
--- a/sys/fs/ext2fs/ext2_csum.c
+++ b/sys/fs/ext2fs/ext2_csum.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
  * Copyright (c) 2017, Fedor Uporov
  * All rights reserved.
  *
diff --git a/sys/fs/ext2fs/ext2_extattr.c b/sys/fs/ext2fs/ext2_extattr.c
index a86ffdfebff..47c0f4ebdcf 100644
--- a/sys/fs/ext2fs/ext2_extattr.c
+++ b/sys/fs/ext2fs/ext2_extattr.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
  * Copyright (c) 2017, Fedor Uporov
  * All rights reserved.
  *
diff --git a/sys/fs/ext2fs/ext2_extattr.h b/sys/fs/ext2fs/ext2_extattr.h
index 50ab6908a0d..75632b7fd55 100644
--- a/sys/fs/ext2fs/ext2_extattr.h
+++ b/sys/fs/ext2fs/ext2_extattr.h
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
  * Copyright (c) 2017, Fedor Uporov
  * All rights reserved.
  *
diff --git a/sys/fs/ext2fs/ext2_inode_cnv.c b/sys/fs/ext2fs/ext2_inode_cnv.c
index ef2fe60ef3f..159d1521725 100644
--- a/sys/fs/ext2fs/ext2_inode_cnv.c
+++ b/sys/fs/ext2fs/ext2_inode_cnv.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: MIT-CMU
+ *
  * Copyright (c) 1995 The University of Utah and
  * the Computer Systems Laboratory at the University of Utah (CSL).
  * All rights reserved.