diff --git a/Tools/autotest/default_params/quadplane.parm b/Tools/autotest/default_params/quadplane.parm
index ade7761534..4ab6320f71 100644
--- a/Tools/autotest/default_params/quadplane.parm
+++ b/Tools/autotest/default_params/quadplane.parm
@@ -15,6 +15,7 @@ COMPASS_OFS_Y    -0.585846
 COMPASS_OFS_Z    6.815743
 EK2_ENABLE       1
 EK2_IMU_MASK     3
+EK3_ENABLE       1
 FBWB_CLIMB_RATE  10
 FLTMODE1         10
 FLTMODE2         11