diff --git a/libraries/AP_InertialSensor/examples/MPU6000/MPU6000.pde b/libraries/AP_InertialSensor/examples/MPU6000/MPU6000.pde
index 932e6316c6..df69b428bd 100644
--- a/libraries/AP_InertialSensor/examples/MPU6000/MPU6000.pde
+++ b/libraries/AP_InertialSensor/examples/MPU6000/MPU6000.pde
@@ -1,4 +1,4 @@
-// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: t -*-
+// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
 
 //
 // Simple test for the AP_InertialSensor driver.
diff --git a/libraries/AP_InertialSensor/examples/OilPan/OilPan.pde b/libraries/AP_InertialSensor/examples/OilPan/OilPan.pde
index 256cb88d8c..936d785c9b 100644
--- a/libraries/AP_InertialSensor/examples/OilPan/OilPan.pde
+++ b/libraries/AP_InertialSensor/examples/OilPan/OilPan.pde
@@ -1,4 +1,4 @@
-// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: t -*-
+// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
 
 //
 // Simple test for the AP_InertialSensor driver.
diff --git a/libraries/AP_InertialSensor/examples/PX4/PX4.pde b/libraries/AP_InertialSensor/examples/PX4/PX4.pde
index eda2ed8dd9..4da9b66290 100644
--- a/libraries/AP_InertialSensor/examples/PX4/PX4.pde
+++ b/libraries/AP_InertialSensor/examples/PX4/PX4.pde
@@ -1,4 +1,4 @@
-// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: t -*-
+// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
 
 //
 // Simple test for the AP_InertialSensor driver.