diff --git a/IR_Encoder.cpp b/IR_Encoder.cpp
index a6eb956..57d8f37 100644
--- a/IR_Encoder.cpp
+++ b/IR_Encoder.cpp
@@ -76,11 +76,11 @@ void IR_Encoder::sendData(uint16_t addrTo, uint8_t dataByte, bool needAccept)
     sendData(addrTo, &dataByte, 1, needAccept);
 }
 
-void IR_Encoder::sendData(uint16_t addrTo, uint8_t *data = nullptr, uint8_t len = 0, bool needAccept = false){
+void IR_Encoder::sendData(uint16_t addrTo, uint8_t *data, uint8_t len, bool needAccept){
     sendData(id, addrTo, data, len, needAccept);
 }
 
-void IR_Encoder::sendData(uint16_t addrFrom, uint16_t addrTo, uint8_t *data = nullptr, uint8_t len = 0, bool needAccept = false)
+void IR_Encoder::sendData(uint16_t addrFrom, uint16_t addrTo, uint8_t *data, uint8_t len, bool needAccept)
 {
     if (len > bytePerPack)
     {