diff --git a/ArduCopter/drift.pde b/ArduCopter/drift.pde
index 0d0bf2ed97..e8de7a20e8 100644
--- a/ArduCopter/drift.pde
+++ b/ArduCopter/drift.pde
@@ -1,52 +1,50 @@
+/// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
+
 ////////////////////////////////////////////////////////////////////////////////
 // Drift Mode
 ////////////////////////////////////////////////////////////////////////////////
 
 #define SPEEDGAIN 14.0
 
-
 // The function call for managing the flight mode drift
 static void
 get_roll_pitch_drift()
 {
 }
 
-
-
 static void
 get_yaw_drift()
 {
-	static float breaker = 0.0;
-	// convert pilot input to lean angles
-	// moved to Yaw since it is called before get_roll_pitch_drift();
-	get_pilot_desired_lean_angles(g.rc_1.control_in, g.rc_2.control_in, control_roll, control_pitch);
+    static float breaker = 0.0;
+    // convert pilot input to lean angles
+    // moved to Yaw since it is called before get_roll_pitch_drift();
+    get_pilot_desired_lean_angles(g.rc_1.control_in, g.rc_2.control_in, control_roll, control_pitch);
 
-	// Grab inertial velocity
-	Vector3f vel = inertial_nav.get_velocity();
+    // Grab inertial velocity
+    Vector3f vel = inertial_nav.get_velocity();
 
-	// rotate roll, pitch input from north facing to vehicle's perspective
-	float roll_vel =  vel.y * cos_yaw - vel.x * sin_yaw; // body roll vel
-	float pitch_vel = vel.y * sin_yaw + vel.x * cos_yaw; // body pitch vel
+    // rotate roll, pitch input from north facing to vehicle's perspective
+    float roll_vel =  vel.y * cos_yaw - vel.x * sin_yaw; // body roll vel
+    float pitch_vel = vel.y * sin_yaw + vel.x * cos_yaw; // body pitch vel
 
-	float pitch_vel2 = min(fabs(pitch_vel), 800);
-	// simple gain scheduling for yaw input
-	get_yaw_rate_stabilized_ef((float)(control_roll/2) * (1.0 - (pitch_vel2 / 2400.0)));
+    float pitch_vel2 = min(fabs(pitch_vel), 800);
+    // simple gain scheduling for yaw input
+    get_yaw_rate_stabilized_ef((float)(control_roll/2) * (1.0 - (pitch_vel2 / 2400.0)));
 
-	roll_vel = constrain_float(roll_vel, -322, 322);
-	pitch_vel = constrain_float(pitch_vel, -322, 322);
+    roll_vel = constrain_float(roll_vel, -322, 322);
+    pitch_vel = constrain_float(pitch_vel, -322, 322);
 
-	// always limit roll
-	get_stabilize_roll(roll_vel * -SPEEDGAIN);
+    // always limit roll
+    get_stabilize_roll(roll_vel * -SPEEDGAIN);
 
-	if(control_pitch == 0){
-		// .14/ (.03 * 100) = 4.6 seconds till full breaking
-		breaker+= .03;
-		breaker = min(breaker, SPEEDGAIN);
-		// If we let go of sticks, bring us to a stop
-		get_stabilize_pitch(pitch_vel * breaker);
-	}else{
-		breaker = 0.0;
-		get_stabilize_pitch(control_pitch);
-	}
+    if(control_pitch == 0){
+        // .14/ (.03 * 100) = 4.6 seconds till full breaking
+        breaker+= .03;
+        breaker = min(breaker, SPEEDGAIN);
+        // If we let go of sticks, bring us to a stop
+        get_stabilize_pitch(pitch_vel * breaker);
+    }else{
+        breaker = 0.0;
+        get_stabilize_pitch(control_pitch);
+    }
 }
-