diff --git a/ArduCopter/ArduCopter.cpp b/ArduCopter/ArduCopter.cpp
index ef48d81930..30ef7cd4b5 100644
--- a/ArduCopter/ArduCopter.cpp
+++ b/ArduCopter/ArduCopter.cpp
@@ -561,7 +561,7 @@ void Copter::read_AHRS(void)
     ahrs.update(true);
 }
 
-// read baro and rangefinder altitude at 10hz
+// read baro and log control tuning
 void Copter::update_altitude()
 {
     // read in baro altitude