diff --git a/libraries/AP_Beacon/AP_Beacon.cpp b/libraries/AP_Beacon/AP_Beacon.cpp
index 42286f4998..c5c82aa8a9 100644
--- a/libraries/AP_Beacon/AP_Beacon.cpp
+++ b/libraries/AP_Beacon/AP_Beacon.cpp
@@ -272,7 +272,7 @@ void AP_Beacon::update_boundary_points()
 
     bool boundary_success = false;  // true once the boundary has been successfully found
     bool boundary_failure = false;  // true if we fail to build the boundary
-    float start_angle = 0.0f;		// starting angle used when searching for next boundary point, on each iteration this climbs but never climbs past PI * 2
+    float start_angle = 0.0f;       // starting angle used when searching for next boundary point, on each iteration this climbs but never climbs past PI * 2
     while (!boundary_success && !boundary_failure) {
         // look for next outer point
         uint8_t next_idx;
diff --git a/libraries/AP_Beacon/AP_Beacon_Backend.h b/libraries/AP_Beacon/AP_Beacon_Backend.h
index 20632ddb0e..905c9d14a3 100644
--- a/libraries/AP_Beacon/AP_Beacon_Backend.h
+++ b/libraries/AP_Beacon/AP_Beacon_Backend.h
@@ -23,9 +23,9 @@ class AP_Beacon_Backend
 {
 public:
     // constructor. This incorporates initialisation as well.
-	AP_Beacon_Backend(AP_Beacon &frontend);
+    AP_Beacon_Backend(AP_Beacon &frontend);
 
-	// return true if sensor is basically healthy (we are receiving data)
+    // return true if sensor is basically healthy (we are receiving data)
     virtual bool healthy() = 0;
 
     // update