diff --git a/libraries/AP_AHRS/examples/AHRS_Test/AHRS_Test.pde b/libraries/AP_AHRS/examples/AHRS_Test/AHRS_Test.pde
index abc711039a..30629d69db 100644
--- a/libraries/AP_AHRS/examples/AHRS_Test/AHRS_Test.pde
+++ b/libraries/AP_AHRS/examples/AHRS_Test/AHRS_Test.pde
@@ -22,6 +22,9 @@
 #include <Filter.h>
 #include <SITL.h>
 #include <AP_Buffer.h>
+#include <AP_Notify.h>
+#include <AP_SpdHgtControl.h>
+#include <DataFlash.h>
 
 #include <AP_HAL_AVR.h>
 #include <AP_HAL_AVR_SITL.h>