diff --git a/libraries/AC_AttitudeControl/ControlMonitor.cpp b/libraries/AC_AttitudeControl/ControlMonitor.cpp
index 5efdb1606c..6bd6760735 100644
--- a/libraries/AC_AttitudeControl/ControlMonitor.cpp
+++ b/libraries/AC_AttitudeControl/ControlMonitor.cpp
@@ -38,7 +38,7 @@ void AC_AttitudeControl::control_monitor_update(void)
 }
 
 /*
-  log a CRTL message
+  log a CTRL message
  */
 void AC_AttitudeControl::control_monitor_log(void) const
 {