diff --git a/Adafruit_GPS.cpp b/Adafruit_GPS.cpp
index eb79b5b..c898c47 100755
--- a/Adafruit_GPS.cpp
+++ b/Adafruit_GPS.cpp
@@ -350,7 +350,7 @@ void Adafruit_GPS::common_init(void) {
     speed = angle = magvariation = HDOP = 0.0; // float
 }
 
-void Adafruit_GPS::begin(uint16_t baud)
+void Adafruit_GPS::begin(uint32_t baud)
 {
 #ifdef __AVR__
   if(gpsSwSerial) 
diff --git a/Adafruit_GPS.h b/Adafruit_GPS.h
index 9ffd993..8a91531 100755
--- a/Adafruit_GPS.h
+++ b/Adafruit_GPS.h
@@ -99,7 +99,7 @@ All text above must be included in any redistribution
 
 class Adafruit_GPS {
  public:
-  void begin(uint16_t baud); 
+  void begin(uint32_t baud); 
 
 #ifdef __AVR__
   #if ARDUINO >= 100