diff --git a/libraries/AP_Mount/examples/trivial_AP_Mount/trivial_AP_Mount.pde b/libraries/AP_Mount/examples/trivial_AP_Mount/trivial_AP_Mount.pde
index d81dca93fe..4fdbbf8b1a 100644
--- a/libraries/AP_Mount/examples/trivial_AP_Mount/trivial_AP_Mount.pde
+++ b/libraries/AP_Mount/examples/trivial_AP_Mount/trivial_AP_Mount.pde
@@ -25,6 +25,7 @@
 #include <AP_Vehicle.h>
 #include <DataFlash.h>
 #include <AP_Notify.h>
+#include <AP_BattMonitor.h>
 
 #include <AP_Mount.h>