diff --git a/libraries/AP_OpticalFlow/AP_OpticalFlow_ADNS3080.cpp b/libraries/AP_OpticalFlow/AP_OpticalFlow_ADNS3080.cpp
index b4fb52ddd9..f3e377cdb5 100644
--- a/libraries/AP_OpticalFlow/AP_OpticalFlow_ADNS3080.cpp
+++ b/libraries/AP_OpticalFlow/AP_OpticalFlow_ADNS3080.cpp
@@ -33,6 +33,17 @@
 
 #define AP_SPI_TIMEOUT 1000
 
+// We use Serial Port 2 in SPI Mode
+#if defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
+	#define AP_SPI_DATAIN      50    // MISO  // PB3
+	#define AP_SPI_DATAOUT     51    // MOSI  // PB2
+	#define AP_SPI_CLOCK       52    // SCK   // PB1
+#else  // normal arduino SPI pins...these need to be checked
+	#define AP_SPI_DATAIN  12        //MISO
+	#define AP_SPI_DATAOUT 11        //MOSI
+	#define AP_SPI_CLOCK   13        //SCK
+#endif
+
 union NumericIntType
 {
    int         intValue;
diff --git a/libraries/AP_OpticalFlow/AP_OpticalFlow_ADNS3080.h b/libraries/AP_OpticalFlow/AP_OpticalFlow_ADNS3080.h
index fc998e139f..60a26f57d9 100644
--- a/libraries/AP_OpticalFlow/AP_OpticalFlow_ADNS3080.h
+++ b/libraries/AP_OpticalFlow/AP_OpticalFlow_ADNS3080.h
@@ -3,6 +3,10 @@
 
 #include "AP_OpticalFlow.h"
 
+// default pin settings
+#define ADNS3080_CHIP_SELECT 34  // PC3
+#define ADNS3080_RESET       0   // reset pin is unattached by default
+
 // orientations for ADNS3080 sensor
 #define AP_OPTICALFLOW_ADNS3080_PINS_FORWARD ROTATION_YAW_180
 #define AP_OPTICALFLOW_ADNS3080_PINS_FORWARD_RIGHT ROTATION_YAW_135
@@ -19,21 +23,6 @@
 // scaler - value returned when sensor is moved equivalent of 1 pixel
 #define AP_OPTICALFLOW_ADNS3080_SCALER  1.1
 
-// We use Serial Port 2 in SPI Mode
-#if defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
-	#define AP_SPI_DATAIN      50    // MISO  // PB3
-	#define AP_SPI_DATAOUT     51    // MOSI  // PB2
-	#define AP_SPI_CLOCK       52    // SCK   // PB1
-	#define ADNS3080_CHIP_SELECT 34  // PC3
-	#define ADNS3080_RESET       0   // reset pin is unattached by default
-#else  // normal arduino SPI pins...these need to be checked
-	#define AP_SPI_DATAIN  12        //MISO
-	#define AP_SPI_DATAOUT 11        //MOSI
-	#define AP_SPI_CLOCK   13        //SCK
-	#define ADNS3080_CHIP_SELECT 10  //SS
-	#define ADNS3080_RESET       9   //RESET
-#endif
-
 // ADNS3080 hardware config
 #define ADNS3080_PIXELS_X                 30
 #define ADNS3080_PIXELS_Y                 30
@@ -85,7 +74,6 @@
 #define ADNS3080_FRAME_RATE_MAX         6469
 #define ADNS3080_FRAME_RATE_MIN         2000
 
-
 class AP_OpticalFlow_ADNS3080 : public AP_OpticalFlow
 {
   private: