1 files changed, 3 insertions, 3 deletions
diff --git a/libmaple/usb/usb.h b/libmaple/usb/usb.h
index ffba9ff..84390cb 100644
--- a/libmaple/usb/usb.h
+++ b/libmaple/usb/usb.h
@@ -73,9 +73,9 @@ void usb_lpIRQHandler(void);
 void usbWaitReset(void);
 
 /* blocking functions for send/receive */
-uint16 usbSendBytes(uint8* sendBuf,uint16 len);
-uint8 usbBytesAvailable(void);
-uint8 usbReceiveBytes(uint8* recvBuf, uint8 len);
+uint32 usbSendBytes(uint8* sendBuf,uint16 len);
+uint32 usbBytesAvailable(void);
+uint32 usbReceiveBytes(uint8* recvBuf, uint8 len);
 uint8 usbGetDTR(void);
 uint8 usbGetRTS(void);
 uint8 usbIsConnected(void);