diff --git a/libraries/AP_InertialSensor/examples/INS_generic/INS_generic.cpp b/libraries/AP_InertialSensor/examples/INS_generic/INS_generic.cpp
index ea1ee6534c..d1fe927dc5 100644
--- a/libraries/AP_InertialSensor/examples/INS_generic/INS_generic.cpp
+++ b/libraries/AP_InertialSensor/examples/INS_generic/INS_generic.cpp
@@ -5,10 +5,14 @@
 #include <AP_HAL/AP_HAL.h>
 #include <AP_BoardConfig/AP_BoardConfig.h>
 #include <AP_InertialSensor/AP_InertialSensor.h>
+#include <AP_ExternalAHRS/AP_ExternalAHRS.h>
 
 const AP_HAL::HAL &hal = AP_HAL::get_HAL();
 
 static AP_InertialSensor ins;
+#if HAL_EXTERNAL_AHRS_ENABLED
+static AP_ExternalAHRS eAHRS;
+#endif // HAL_EXTERNAL_AHRS_ENABLED
 
 static void display_offsets_and_scaling();
 static void run_test();