diff --git a/mk/PX4/ROMFS/init.d/rc.APM b/mk/PX4/ROMFS/init.d/rc.APM
index f0bce4ee2d..3c5700bf58 100644
--- a/mk/PX4/ROMFS/init.d/rc.APM
+++ b/mk/PX4/ROMFS/init.d/rc.APM
@@ -376,6 +376,12 @@ then
     fi
 fi
 
+# optional smbus battery monitor
+if batt_smbus start
+then
+    echo "Found batt_smbus"
+fi
+
 if [ $BOARD == FMUv2 ]
 then
   # the ramtron on FMUv2 is very fast and can handle trillions of