diff --git a/hardware/arduino/sam/cores/arduino/USB/HID.cpp b/hardware/arduino/sam/cores/arduino/USB/HID.cpp
index 72db8e4dc..c243f4951 100644
--- a/hardware/arduino/sam/cores/arduino/USB/HID.cpp
+++ b/hardware/arduino/sam/cores/arduino/USB/HID.cpp
@@ -152,15 +152,13 @@ int WEAK HID_GetDescriptor(int i)
 
 void WEAK HID_SendReport(uint8_t id, const void* data, uint32_t len)
 {
-	uint8_t p[5];
-	uint8_t* d = (uint8_t*)data;
+	uint8_t p[64];
+	const uint8_t *d = reinterpret_cast<const uint8_t *>(data);
 
 	p[0] = id;
-	p[1] = d[0];
-	p[2] = d[1];
-	p[3] = d[2];
-	p[4] = d[3];
-	USBD_Send(HID_TX, p, 5);
+	for (uint32_t i=0; i<len; i++)
+		p[i+1] = d[i];
+	USBD_Send(HID_TX, p, len+1);
 }
 
 bool WEAK HID_Setup(Setup& setup)