diff --git a/libraries/HID/HID.cpp b/libraries/HID/HID.cpp
index 3a42699..8adf1a9 100644
--- a/libraries/HID/HID.cpp
+++ b/libraries/HID/HID.cpp
@@ -88,10 +88,11 @@ void HID_::AppendDescriptor(HIDSubDescriptor *node)
 
 int HID_::SendReport(uint8_t id, const void* data, int len)
 {
-    int ret = 0;
-	ret += USB_Send(pluggedEndpoint, &id, 1);
-	ret += USB_Send(pluggedEndpoint | TRANSFER_RELEASE, data, len);
-	return ret;
+    auto ret = USB_Send(pluggedEndpoint, &id, 1);
+    if(ret >= 0){
+        ret += USB_Send(pluggedEndpoint | TRANSFER_RELEASE, data, len);
+    }
+    return ret;
 }
 
 bool HID_::setup(USBSetup& setup)