diff --git a/libraries/AC_Sprayer/examples/AC_Sprayer_test/AC_Sprayer_test.pde b/libraries/AC_Sprayer/examples/AC_Sprayer_test/AC_Sprayer_test.pde
index d122f7102c..9e96e2e5da 100644
--- a/libraries/AC_Sprayer/examples/AC_Sprayer_test/AC_Sprayer_test.pde
+++ b/libraries/AC_Sprayer/examples/AC_Sprayer_test/AC_Sprayer_test.pde
@@ -26,6 +26,7 @@
 #include <APM_PI.h>             // PID library
 #include <AP_Buffer.h>          // ArduPilot general purpose FIFO buffer
 #include <AP_InertialNav.h>     // Inertial Navigation library
+#include <DataFlash.h>
 #include <GCS_MAVLink.h>
 #include <RC_Channel.h>
 #include <AC_Sprayer.h>         // Crop Sprayer library