diff --git a/cores/arduino/HID.cpp b/cores/arduino/HID.cpp
index e6fb5f7..b60b3c0 100644
--- a/cores/arduino/HID.cpp
+++ b/cores/arduino/HID.cpp
@@ -144,7 +144,6 @@ u8 _hid_protocol = 1;
 u8 _hid_idle = 1;
 
 #define WEAK __attribute__ ((weak))
-#define WEAK 
 
 int WEAK HID_GetInterface(u8* interfaceNum)
 {
@@ -245,7 +244,7 @@ void Mouse_::release(uint8_t b)
 
 bool Mouse_::isPressed(uint8_t b)
 {
-	if (b & _buttons > 0) 
+	if ((b & _buttons) > 0) 
 		return true;
 	return false;
 }
diff --git a/cores/arduino/USBAPI.h b/cores/arduino/USBAPI.h
index 6a0b989..3c97ff1 100644
--- a/cores/arduino/USBAPI.h
+++ b/cores/arduino/USBAPI.h
@@ -104,7 +104,7 @@ private:
 	void setKeyMap(KeyMap* keyMap);	
 public:
 	Keyboard_();
-	virtual size_t write(uint8_t c) {type(c);};
+	virtual size_t write(uint8_t c) {return type(c);};
 	virtual size_t type(uint8_t c);
 };
 extern Keyboard_ Keyboard;