diff --git a/lib/libspl/include/sys/stack.h b/lib/libspl/include/sys/stack.h
index 496605f956..41f0beb168 100644
--- a/lib/libspl/include/sys/stack.h
+++ b/lib/libspl/include/sys/stack.h
@@ -1,3 +1,23 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
 /*
  * This header file distributed under the terms of the CDDL.
  * Portions Copyright 2008 Sun Microsystems, Inc. All Rights reserved.
diff --git a/lib/libspl/include/sys/stropts.h b/lib/libspl/include/sys/stropts.h
index 3c86957baf..e036b0ea23 100644
--- a/lib/libspl/include/sys/stropts.h
+++ b/lib/libspl/include/sys/stropts.h
@@ -1,3 +1,28 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
 #ifndef _LIBSPL_SYS_STROPTS_H
 #define _LIBSPL_SYS_STROPTS_H