diff --git a/Tools/Replay/LR_MsgHandler.h b/Tools/Replay/LR_MsgHandler.h
index b172563bd9..6e1474a782 100644
--- a/Tools/Replay/LR_MsgHandler.h
+++ b/Tools/Replay/LR_MsgHandler.h
@@ -1,6 +1,7 @@
 #pragma once
 
 #include "MsgHandler.h"
+#include <AP_AHRS/AP_AHRS.h>
 #include <AP_GPS/AP_GPS.h>
 
 #include <functional>
diff --git a/Tools/Replay/MsgHandler.cpp b/Tools/Replay/MsgHandler.cpp
index a781d73fee..cee5779a41 100644
--- a/Tools/Replay/MsgHandler.cpp
+++ b/Tools/Replay/MsgHandler.cpp
@@ -1,4 +1,5 @@
 #include "MsgHandler.h"
+#include <AP_AHRS/AP_AHRS.h>
 
 void fatal(const char *msg) {
     ::printf("%s",msg);