diff --git a/cube/User/Inc/mbusComm.h b/cube/User/Inc/mbusComm.h
index d8999db..be8ef3c 100644
--- a/cube/User/Inc/mbusComm.h
+++ b/cube/User/Inc/mbusComm.h
@@ -1,8 +1,10 @@
 #ifndef _MBUSCOMM_H_
 #define _MBUSCOMM_H_
 
+#include <main.h>
 #include <stdint.h>
 
 void mbusCommRequest(uint8_t cmd, uint8_t addr);
+void mbusCommTxCpltCallback(UART_HandleTypeDef *huart);
 
 #endif // _MBUSCOMM_H_