diff --git a/src/ec/51nb/npce985la0dx/npce985la0dx.c b/src/ec/51nb/npce985la0dx/npce985la0dx.c
index f435d3222e..06db530c3b 100644
--- a/src/ec/51nb/npce985la0dx/npce985la0dx.c
+++ b/src/ec/51nb/npce985la0dx/npce985la0dx.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later  */
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 
 #include <device/pnp.h>
 
diff --git a/src/mainboard/51nb/x210/acpi/battery.asl b/src/mainboard/51nb/x210/acpi/battery.asl
index 33e5aeb889..f9022a4c75 100644
--- a/src/mainboard/51nb/x210/acpi/battery.asl
+++ b/src/mainboard/51nb/x210/acpi/battery.asl
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later  */
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 
 Device (BAT)
 {
diff --git a/src/mainboard/51nb/x210/acpi/ec.asl b/src/mainboard/51nb/x210/acpi/ec.asl
index c7a91774d3..78e156c6a2 100644
--- a/src/mainboard/51nb/x210/acpi/ec.asl
+++ b/src/mainboard/51nb/x210/acpi/ec.asl
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later  */
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 
 Device (EC)
 {
diff --git a/src/mainboard/51nb/x210/acpi/graphics.asl b/src/mainboard/51nb/x210/acpi/graphics.asl
index 3c44c47ca2..e703ba1936 100644
--- a/src/mainboard/51nb/x210/acpi/graphics.asl
+++ b/src/mainboard/51nb/x210/acpi/graphics.asl
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later  */
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 
 Device (GFX0)
 {
diff --git a/src/mainboard/51nb/x210/acpi/mainboard.asl b/src/mainboard/51nb/x210/acpi/mainboard.asl
index c8c4f255a9..89df7f4d93 100644
--- a/src/mainboard/51nb/x210/acpi/mainboard.asl
+++ b/src/mainboard/51nb/x210/acpi/mainboard.asl
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later  */
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 
 Scope (\_SB)
 {
diff --git a/src/mainboard/51nb/x210/acpi/platform.asl b/src/mainboard/51nb/x210/acpi/platform.asl
index fc0333511b..6cf3f32f23 100644
--- a/src/mainboard/51nb/x210/acpi/platform.asl
+++ b/src/mainboard/51nb/x210/acpi/platform.asl
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later  */
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 
 /* Enable ACPI _SWS methods */
 #include <soc/intel/common/acpi/acpi_wake_source.asl>
diff --git a/src/mainboard/51nb/x210/acpi/superio.asl b/src/mainboard/51nb/x210/acpi/superio.asl
index 6fe3084c5e..ee2eabeb75 100644
--- a/src/mainboard/51nb/x210/acpi/superio.asl
+++ b/src/mainboard/51nb/x210/acpi/superio.asl
@@ -1,3 +1,3 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later  */
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 
 #include <drivers/pc80/pc/ps2_controller.asl>
diff --git a/src/mainboard/51nb/x210/dsdt.asl b/src/mainboard/51nb/x210/dsdt.asl
index c648d42568..dde48abc54 100644
--- a/src/mainboard/51nb/x210/dsdt.asl
+++ b/src/mainboard/51nb/x210/dsdt.asl
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later  */
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 
 #include <acpi/acpi.h>
 
diff --git a/src/mainboard/51nb/x210/gpio.h b/src/mainboard/51nb/x210/gpio.h
index c517b44628..201fed67c2 100644
--- a/src/mainboard/51nb/x210/gpio.h
+++ b/src/mainboard/51nb/x210/gpio.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later  */
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 
 #ifndef MAINBOARD_GPIO_H
 #define MAINBOARD_GPIO_H
diff --git a/src/mainboard/51nb/x210/hda_verb.c b/src/mainboard/51nb/x210/hda_verb.c
index 6799c38735..730cc443a7 100644
--- a/src/mainboard/51nb/x210/hda_verb.c
+++ b/src/mainboard/51nb/x210/hda_verb.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later  */
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 
 #include <device/azalia_device.h>
 
diff --git a/src/mainboard/51nb/x210/mainboard.c b/src/mainboard/51nb/x210/mainboard.c
index 4e6f1d588a..e05331c1ed 100644
--- a/src/mainboard/51nb/x210/mainboard.c
+++ b/src/mainboard/51nb/x210/mainboard.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later  */
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 
 #include <soc/ramstage.h>
 #include "gpio.h"
diff --git a/src/mainboard/51nb/x210/romstage.c b/src/mainboard/51nb/x210/romstage.c
index 60f008c20a..2112e2587f 100644
--- a/src/mainboard/51nb/x210/romstage.c
+++ b/src/mainboard/51nb/x210/romstage.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later  */
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 
 #include <assert.h>
 #include <soc/romstage.h>
diff --git a/src/mainboard/google/dedede/romstage.c b/src/mainboard/google/dedede/romstage.c
index af79c809a8..db6f7db4f0 100644
--- a/src/mainboard/google/dedede/romstage.c
+++ b/src/mainboard/google/dedede/romstage.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later  */
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 
 #include <baseboard/variants.h>
 #include <console/console.h>