diff --git a/ArduPlane/defines.h b/ArduPlane/defines.h
index efbd15564e..fe75e53596 100644
--- a/ArduPlane/defines.h
+++ b/ArduPlane/defines.h
@@ -30,6 +30,9 @@
 #define SONAR 0
 #define BARO 1
 
+#define PITOT_SOURCE_ADC 1
+#define PITOT_SOURCE_ANALOG_PIN 2
+
 #define T6 1000000
 #define T7 10000000
 
@@ -227,4 +230,10 @@ enum gcs_severity {
 // mark a function as not to be inlined
 #define NOINLINE __attribute__((noinline))
 
+#define CONFIG_IMU_OILPAN 1
+#define CONFIG_IMU_MPU6000 2
+
+#define APM_HARDWARE_APM1  1
+#define APM_HARDWARE_PURPLE 2
+
 #endif // _DEFINES_H