diff --git a/hardware/arduino/sam/libraries/HID/HID.h b/hardware/arduino/sam/libraries/HID/HID.h
index 5c8313b5d..f28d07918 100644
--- a/hardware/arduino/sam/libraries/HID/HID.h
+++ b/hardware/arduino/sam/libraries/HID/HID.h
@@ -46,7 +46,7 @@ class HIDDescriptorListNode {
 public:
   HIDDescriptorListNode *next = NULL;
   HIDDescriptorListNode(const void *d, uint16_t l) : data(d), length(l) { }
-  uint8_t length;
+  uint16_t length;
   const void* data;
 };