diff --git a/conf/autopilot/subsystems/fixedwing/attitude_infrared.makefile b/conf/autopilot/subsystems/fixedwing/attitude_infrared.makefile
index 8c73b1c5fd..23f2f5b099 100644
--- a/conf/autopilot/subsystems/fixedwing/attitude_infrared.makefile
+++ b/conf/autopilot/subsystems/fixedwing/attitude_infrared.makefile
@@ -18,3 +18,5 @@ ap.CFLAGS += -DADC_CHANNEL_IR_NB_SAMPLES=$(ADC_IR_NB_SAMPLES)
 ap.CFLAGS += -DINFRARED
 ap.srcs += $(SRC_FIXEDWING)/infrared.c
 
+sim.CFLAGS += -DINFRARED
+sim.srcs += $(SRC_FIXEDWING)/infrared.c $(SRC_ARCH)/sim_ap.c
diff --git a/conf/autopilot/subsystems/fixedwing/autopilot.makefile b/conf/autopilot/subsystems/fixedwing/autopilot.makefile
index bbaf038505..fbc8261c7d 100644
--- a/conf/autopilot/subsystems/fixedwing/autopilot.makefile
+++ b/conf/autopilot/subsystems/fixedwing/autopilot.makefile
@@ -27,8 +27,8 @@ $(TARGET).CFLAGS += -DBOARD_CONFIG=$(BOARD_CFG)
 
 $(TARGET).CFLAGS += -DWIND_INFO -DTRAFFIC_INFO
 
-sim.CFLAGS += -DSITL -DAP -DFBW -DRADIO_CONTROL -DINTER_MCU -DDOWNLINK -DDOWNLINK_TRANSPORT=IvyTransport -DINFRARED -DLED
-sim.srcs += latlong.c radio_control.c downlink.c commands.c gps.c inter_mcu.c infrared.c estimator.c sys_time.c main_fbw.c main_ap.c datalink.c $(SRC_ARCH)/ppm_hw.c $(SRC_ARCH)/sim_gps.c $(SRC_ARCH)/sim_ir.c $(SRC_ARCH)/sim_ap.c $(SRC_ARCH)/ivy_transport.c $(SRC_ARCH)/sim_adc_generic.c $(SRC_ARCH)/led_hw.c
+sim.CFLAGS += -DSITL -DAP -DFBW -DRADIO_CONTROL -DINTER_MCU -DDOWNLINK -DDOWNLINK_TRANSPORT=IvyTransport -DLED
+sim.srcs += latlong.c radio_control.c downlink.c commands.c gps.c inter_mcu.c estimator.c sys_time.c main_fbw.c main_ap.c datalink.c $(SRC_ARCH)/ppm_hw.c $(SRC_ARCH)/sim_gps.c $(SRC_ARCH)/sim_ir.c $(SRC_ARCH)/ivy_transport.c $(SRC_ARCH)/sim_adc_generic.c $(SRC_ARCH)/led_hw.c