diff --git a/Tools/Replay/Replay.pde b/Tools/Replay/Replay.pde
index 214c82d6cc..649c066d70 100644
--- a/Tools/Replay/Replay.pde
+++ b/Tools/Replay/Replay.pde
@@ -45,6 +45,7 @@
 #include <AP_NavEKF.h>
 #include <AP_Mission.h>
 #include <AP_Rally.h>
+#include <AP_BattMonitor.h>
 #include <AP_Terrain.h>
 #include <Parameters.h>
 #include <stdio.h>