diff --git a/ROMFS/px4fmu_common/init.d-posix/airframes/1041_gazebo-classic_tailsitter b/ROMFS/px4fmu_common/init.d-posix/airframes/1041_gazebo-classic_tailsitter
index efcff639956..c47a8fb9dd7 100644
--- a/ROMFS/px4fmu_common/init.d-posix/airframes/1041_gazebo-classic_tailsitter
+++ b/ROMFS/px4fmu_common/init.d-posix/airframes/1041_gazebo-classic_tailsitter
@@ -44,6 +44,12 @@ param set-default PWM_MAIN_FUNC6 201
 param set-default PWM_MAIN_FUNC7 202
 param set-default PWM_MAIN_REV 96 # invert both elevons
 
+# Single-EKF (for replay)
+param set-default EKF2_MULTI_IMU 0
+param set-default SENS_IMU_MODE 1
+param set-default EKF2_MULTI_MAG 0
+param set-default SENS_MAG_MODE 1
+
 param set-default NPFG_PERIOD 12
 param set-default FW_PR_I 0.2
 param set-default FW_PR_P 0.2