diff --git a/posix-configs/SITL/init/rc.fixed_wing b/posix-configs/SITL/init/rc.fixed_wing
index 7cdad2f9dc..bdb2fb8e9d 100644
--- a/posix-configs/SITL/init/rc.fixed_wing
+++ b/posix-configs/SITL/init/rc.fixed_wing
@@ -39,7 +39,7 @@ navigator start
 ekf_att_pos_estimator start
 fw_att_control start
 fw_pos_control_l1 start
-mixer load /dev/pwm_output0 ../../ROMFS/px4fmu_common/mixers/IO_pass.main.mix
+mixer load /dev/pwm_output0 ../../../../ROMFS/px4fmu_common/mixers/IO_pass.main.mix
 mavlink start -u 14556 -r 60000
 mavlink stream -r 50 -s POSITION_TARGET_LOCAL_NED -u 14556
 mavlink stream -r 50 -s LOCAL_POSITION_NED -u 14556
diff --git a/posix-configs/SITL/init/rc_iris_ros b/posix-configs/SITL/init/rc_iris_ros
index ffef510989..096f659d65 100644
--- a/posix-configs/SITL/init/rc_iris_ros
+++ b/posix-configs/SITL/init/rc_iris_ros
@@ -58,7 +58,7 @@ attitude_estimator_q start
 position_estimator_inav start
 mc_pos_control_m start
 mc_att_control_m start
-mixer load /dev/pwm_output0 ../../ROMFS/px4fmu_common/mixers/quad_x.main.mix
+mixer load /dev/pwm_output0 ../../../../ROMFS/px4fmu_common/mixers/quad_x.main.mix
 mavlink start -u 14556 -r 2000000
 mavlink stream -r 80 -s POSITION_TARGET_LOCAL_NED -u 14556
 mavlink stream -r 80 -s LOCAL_POSITION_NED -u 14556