diff --git a/ROMFS/px4fmu_common/init.d-posix/airframes/10040_sihsim_quadx b/ROMFS/px4fmu_common/init.d-posix/airframes/10040_sihsim_quadx
index 7c04d44650..077d908ec5 100644
--- a/ROMFS/px4fmu_common/init.d-posix/airframes/10040_sihsim_quadx
+++ b/ROMFS/px4fmu_common/init.d-posix/airframes/10040_sihsim_quadx
@@ -38,4 +38,6 @@ param set-default PWM_MAIN_FUNC2 102
 param set-default PWM_MAIN_FUNC3 103
 param set-default PWM_MAIN_FUNC4 104
 
+param set-default EKF2_GPS_DELAY 0
+
 param set SIH_VEHICLE_TYPE 0
diff --git a/ROMFS/px4fmu_common/init.d-posix/airframes/10041_sihsim_airplane b/ROMFS/px4fmu_common/init.d-posix/airframes/10041_sihsim_airplane
index 000ac9766b..36a69b7714 100644
--- a/ROMFS/px4fmu_common/init.d-posix/airframes/10041_sihsim_airplane
+++ b/ROMFS/px4fmu_common/init.d-posix/airframes/10041_sihsim_airplane
@@ -49,3 +49,5 @@ param set-default PWM_MAIN_FUNC1 201
 param set-default PWM_MAIN_FUNC2 202
 param set-default PWM_MAIN_FUNC3 203
 param set-default PWM_MAIN_FUNC4 101
+
+param set-default EKF2_GPS_DELAY 0
diff --git a/ROMFS/px4fmu_common/init.d-posix/airframes/10042_sihsim_xvert b/ROMFS/px4fmu_common/init.d-posix/airframes/10042_sihsim_xvert
index 4910dbc850..d82b92c1ef 100644
--- a/ROMFS/px4fmu_common/init.d-posix/airframes/10042_sihsim_xvert
+++ b/ROMFS/px4fmu_common/init.d-posix/airframes/10042_sihsim_xvert
@@ -11,6 +11,7 @@
 PX4_SIMULATOR=${PX4_SIMULATOR:=sihsim}
 PX4_SIM_MODEL=${PX4_SIM_MODEL:=xvert}
 
+param set-default EKF2_GPS_DELAY 0
 param set-default EKF2_FUSE_BETA 0 # side slip fusion is currently not supported for tailsitters
 
 param set-default SENS_EN_GPSSIM 1