diff --git a/src/HID/HID.cpp b/src/HID/HID.cpp
index e9b969a..54e8d6f 100644
--- a/src/HID/HID.cpp
+++ b/src/HID/HID.cpp
@@ -166,7 +166,7 @@ bool HID_::LockFeature(uint16_t id, bool lock) {
 }
 
 
-int HID_::SendReport(uint16_t id, const void* data, int len)
+int HID_::SendReport(uint8_t id, const void* data, int len)
 {
     auto ret = USB_Send(HID_TX, &id, 1);
     if (ret < 0) return ret;
diff --git a/src/HID/HID.h b/src/HID/HID.h
index bb55aa2..379e506 100644
--- a/src/HID/HID.h
+++ b/src/HID/HID.h
@@ -115,7 +115,7 @@ class HID_ : public PluggableUSBModule
 public:
     HID_(void);
     int begin(void);
-    int SendReport(uint16_t id, const void* data, int len);
+    int SendReport(uint8_t id, const void* data, int len);
     int SetFeature(uint16_t id, const void* data, int len);
     bool LockFeature(uint16_t id, bool lock);
     
diff --git a/src/HIDPowerDevice.cpp b/src/HIDPowerDevice.cpp
index 5217e04..66c96df 100755
--- a/src/HIDPowerDevice.cpp
+++ b/src/HIDPowerDevice.cpp
@@ -249,12 +249,12 @@ void HIDPowerDevice_::setSerial(const char* s) {
 void HIDPowerDevice_::end(void) {
 }
 
-int HIDPowerDevice_::sendDate(uint16_t id, uint16_t year, uint8_t month, uint8_t day) {
+int HIDPowerDevice_::sendDate(uint8_t id, uint16_t year, uint8_t month, uint8_t day) {
     uint16_t bval = (year - 1980)*512 + month * 32 + day;
     return HID().SendReport(id, &bval, sizeof (bval));
 }
 
-int HIDPowerDevice_::sendReport(uint16_t id, const void* bval, int len) {
+int HIDPowerDevice_::sendReport(uint8_t id, const void* bval, int len) {
     return HID().SendReport(id, bval, len);
 }
 
diff --git a/src/HIDPowerDevice.h b/src/HIDPowerDevice.h
index 888b860..e4be454 100755
--- a/src/HIDPowerDevice.h
+++ b/src/HIDPowerDevice.h
@@ -121,8 +121,8 @@ class HIDPowerDevice_  {
   
   void end(void);
   
-  int sendDate(uint16_t id, uint16_t year, uint8_t month, uint8_t day);
-  int sendReport(uint16_t id, const void* bval, int len);
+  int sendDate(uint8_t id, uint16_t year, uint8_t month, uint8_t day);
+  int sendReport(uint8_t id, const void* bval, int len);
   
   int setFeature(uint16_t id, const void* data, int len);