diff --git a/src/drivers/px4fmu/fmu.cpp b/src/drivers/px4fmu/fmu.cpp
index 65c23423a8..81712d1860 100644
--- a/src/drivers/px4fmu/fmu.cpp
+++ b/src/drivers/px4fmu/fmu.cpp
@@ -2499,7 +2499,7 @@ fmu_new_mode(PortMode new_mode)
 		break;
 
 	case PORT_PWM3:
-		/* select 4-pin PWM mode */
+		/* select 3-pin PWM mode */
 		servo_mode = PX4FMU::MODE_3PWM;
 		break;