diff --git a/conf/autopilot/subsystems/fixedwing/attitude_infrared.makefile b/conf/autopilot/subsystems/fixedwing/attitude_infrared.makefile
index 5df712f8aa..34a12e0fa7 100644
--- a/conf/autopilot/subsystems/fixedwing/attitude_infrared.makefile
+++ b/conf/autopilot/subsystems/fixedwing/attitude_infrared.makefile
@@ -1 +1 @@
-$(error Attitude estimation via infrared has been implemented as an AHRS subsystem now. Please replace with and add the module in your airframe file.)
+$(error Attitude estimation via infrared has been implemented as an AHRS subsystem now. Please replace with and add the module in your airframe file.)