diff --git a/conf/flight_plans/OpenUAS/include_obc2014_mission.xml b/conf/flight_plans/OpenUAS/include_obc2014_mission.xml
index 6e8973843f7..2f0829fa54e 100644
--- a/conf/flight_plans/OpenUAS/include_obc2014_mission.xml
+++ b/conf/flight_plans/OpenUAS/include_obc2014_mission.xml
@@ -201,7 +201,7 @@ TST-3 = -26° 35' 23.2" * 151° 50' 45.9"
 -->
       <!--  TODO Set QNH here based on GPS height if allowed from commitee -->
       <call fun="NavSetAltitudeReferenceHere()" />
-      <!-- CDW call fun="compute_qnh()"/-->
+      <set var="air_data.calc_qnh_once" value="TRUE"/>
     </block>
 
     <!-- *********** Set the ground reference height and the home position *********** -->