diff --git a/ports/mimxrt10xx/peripherals/mimxrt10xx/MIMXRT1011/clocks.c b/ports/mimxrt10xx/peripherals/mimxrt10xx/MIMXRT1011/clocks.c
index fa86b967a1..c039917856 100644
--- a/ports/mimxrt10xx/peripherals/mimxrt10xx/MIMXRT1011/clocks.c
+++ b/ports/mimxrt10xx/peripherals/mimxrt10xx/MIMXRT1011/clocks.c
@@ -23,6 +23,12 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  * THE SOFTWARE.
  */
+/*
+ * Copyright 2019 NXP
+ * All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
 
 #include "mpconfigport.h"
 
diff --git a/ports/mimxrt10xx/peripherals/mimxrt10xx/MIMXRT1062/clocks.c b/ports/mimxrt10xx/peripherals/mimxrt10xx/MIMXRT1062/clocks.c
index 7f54ced0fe..cafc8efc3b 100644
--- a/ports/mimxrt10xx/peripherals/mimxrt10xx/MIMXRT1062/clocks.c
+++ b/ports/mimxrt10xx/peripherals/mimxrt10xx/MIMXRT1062/clocks.c
@@ -23,6 +23,12 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  * THE SOFTWARE.
  */
+/*
+ * Copyright 2019 NXP
+ * All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
 
 #include "mpconfigport.h"