diff --git a/conf/airframes/twinjet1.xml b/conf/airframes/twinjet1.xml
index 64943381a9..dc1a437d43 100644
--- a/conf/airframes/twinjet1.xml
+++ b/conf/airframes/twinjet1.xml
@@ -164,7 +164,7 @@ fbw.srcs = sys_time.c $(SRC_ARCH)/sys_time_hw.c $(SRC_ARCH)/armVIC.c main_fbw.c
 fbw.srcs += commands.c
 
 fbw.CFLAGS += -DACTUATORS=\"servos_4017_hw.h\" -DSERVOS_4017 -DSERVOS_4017_CLOCK_FALLING
-fbw.srcs += $(SRC_ARCH)/servos_4017_hw.c
+fbw.srcs += $(SRC_ARCH)/servos_4017_hw.c actuators.c
 
 fbw.CFLAGS += -DRADIO_CONTROL -DRADIO_CONTROL_TYPE=RC_FUTABA
 fbw.srcs += radio_control.c $(SRC_ARCH)/ppm_hw.c