diff --git a/conf/airframes/booz2_flixr.xml b/conf/airframes/booz2_flixr.xml
index bf412ec341..0e4330f79d 100644
--- a/conf/airframes/booz2_flixr.xml
+++ b/conf/airframes/booz2_flixr.xml
@@ -228,11 +228,13 @@
 		ap.CFLAGS += -DUSE_GPS_ACC4R
         #ap.CFLAGS += -DGPS_LAG=0.5
 
+        ap.CFLAGS += -DB2_GUIDANCE_H_USE_REF
+        sim.CFLAGS += -DB2_GUIDANCE_H_USE_REF
+
         #ap.CFLAGS += -DBOOZ_FAILSAFE_GROUND_DETECT
         ap.CFLAGS += -DUSE_ADAPT_HOVER -DUSE_INS_NAV_INIT -DBOOZ_START_DELAY=2
+        sim.CFLAGS += -DUSE_ADAPT_HOVER -DUSE_INS_NAV_INIT
 
-        #ap.srcs += $(SRC_BOOZ_ARCH)/booz2_pwm_hw.c  $(SRC_BOOZ)/booz_drop.c
-        #ap.CFLAGS += -DUSE_DROP
   </makefile>
 
 </airframe>