diff --git a/ROMFS/px4fmu_common/init.d-posix/airframes/4003_gz_rc_cessna b/ROMFS/px4fmu_common/init.d-posix/airframes/4003_gz_rc_cessna
index 908392674d..af2dbeb2f6 100644
--- a/ROMFS/px4fmu_common/init.d-posix/airframes/4003_gz_rc_cessna
+++ b/ROMFS/px4fmu_common/init.d-posix/airframes/4003_gz_rc_cessna
@@ -78,3 +78,6 @@ param set-default SIM_GZ_SV_FUNC3 203
 param set-default SIM_GZ_SV_FUNC4 204
 param set-default SIM_GZ_SV_FUNC5 205
 param set-default SIM_GZ_SV_FUNC6 206
+
+# Start simulated magnetometer
+param set-default SENS_EN_MAGSIM 1
diff --git a/ROMFS/px4fmu_common/init.d-posix/airframes/4010_gz_x500_mono_cam b/ROMFS/px4fmu_common/init.d-posix/airframes/4010_gz_x500_mono_cam
index 835211904f..5f3c32dd8a 100644
--- a/ROMFS/px4fmu_common/init.d-posix/airframes/4010_gz_x500_mono_cam
+++ b/ROMFS/px4fmu_common/init.d-posix/airframes/4010_gz_x500_mono_cam
@@ -8,3 +8,6 @@
 PX4_SIM_MODEL=${PX4_SIM_MODEL:=x500_mono_cam}
 
 . ${R}etc/init.d-posix/airframes/4001_gz_x500
+
+# Start simulated magnetometer
+param set-default SENS_EN_MAGSIM 1