diff --git a/MotorDriver.cpp b/MotorDriver.cpp
index f18050e..2fc726c 100644
--- a/MotorDriver.cpp
+++ b/MotorDriver.cpp
@@ -39,7 +39,9 @@ volatile portreg_t shadowPORTD;
 volatile portreg_t shadowPORTE;
 volatile portreg_t shadowPORTF;
 #endif
-
+#ifdef ARDUINO_GIGA
+extern gpio_t digitalPinToGpio(int P);
+#endif
 MotorDriver::MotorDriver(int16_t power_pin, byte signal_pin, byte signal_pin2, int16_t brake_pin,
                          byte current_pin, float sense_factor, unsigned int trip_milliamps, int16_t fault_pin) {
   const FSH * warnString = F("** WARNING **");
diff --git a/MotorDriver.h b/MotorDriver.h
index 12e44c5..43acb30 100644
--- a/MotorDriver.h
+++ b/MotorDriver.h
@@ -31,7 +31,6 @@
 enum TRACK_MODE : byte {TRACK_MODE_NONE = 1, TRACK_MODE_MAIN = 2, TRACK_MODE_PROG = 4,
                         TRACK_MODE_DC = 8, TRACK_MODE_DCX = 16, TRACK_MODE_EXT = 32};
 #ifdef ARDUINO_GIGA
-extern gpio_t digitalPinToGpio(int P);
 #define setHIGH(fastpin)  gpio_write(&fastpin, 1)
 #define setLOW(fastpin) gpio_write(&fastpin, 0)
 #else