diff --git a/drivers/usb/serial/keyspan_usa26msg.h b/drivers/usb/serial/keyspan_usa26msg.h
index 09e21e84fc4e03ed7db638c402bbfd66e02918ef..a68f1fb25b8a996cc2d601c5f72a02cafa1500ad 100644
--- a/drivers/usb/serial/keyspan_usa26msg.h
+++ b/drivers/usb/serial/keyspan_usa26msg.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
 	usa26msg.h
 
diff --git a/drivers/usb/serial/keyspan_usa28msg.h b/drivers/usb/serial/keyspan_usa28msg.h
index dee454c4609a2a51a60169b41f3420b5937ddad7..a19f3fe5d98d346719185459d713aefd646119be 100644
--- a/drivers/usb/serial/keyspan_usa28msg.h
+++ b/drivers/usb/serial/keyspan_usa28msg.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
 	usa28msg.h
 
diff --git a/drivers/usb/serial/keyspan_usa49msg.h b/drivers/usb/serial/keyspan_usa49msg.h
index 163b2dea2ec5ccd7fba706068031b69a134ad377..8c3970fdd868a407b87f9a80468e67f1ac7c2dff 100644
--- a/drivers/usb/serial/keyspan_usa49msg.h
+++ b/drivers/usb/serial/keyspan_usa49msg.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
 	usa49msg.h
 
diff --git a/drivers/usb/serial/keyspan_usa67msg.h b/drivers/usb/serial/keyspan_usa67msg.h
index 20fa3e2f7187a4c84da1fd524eb67afd10e4532e..dcf502fdbb44430c29d2bfc6d1c40257ed483302 100644
--- a/drivers/usb/serial/keyspan_usa67msg.h
+++ b/drivers/usb/serial/keyspan_usa67msg.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
 	usa67msg.h
 
diff --git a/drivers/usb/serial/keyspan_usa90msg.h b/drivers/usb/serial/keyspan_usa90msg.h
index 86708ecd87357095629d6f670938b2da30e456ac..c4ca0f631d20a9085294f67e1fe356e55a209b9b 100644
--- a/drivers/usb/serial/keyspan_usa90msg.h
+++ b/drivers/usb/serial/keyspan_usa90msg.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
 	usa90msg.h