+#if !HAS_ACCEL && HAS_MPU9250
+
+#define HAS_ACCEL 1
+
+typedef int16_t accel_t;
+
+/* MPU9250 is hooked up so that positive y is positive acceleration */
+#define ao_data_accel_raw(packet) (-(packet)->mpu9250.accel_y)
+#define ao_data_accel_invert(a) (-(a))
+
+#endif
+