diff --git a/src/ir_decoder/include/ir_decode.h b/src/ir_decoder/include/ir_decode.h
index 496de38..b2fff07 100644
--- a/src/ir_decoder/include/ir_decode.h
+++ b/src/ir_decoder/include/ir_decode.h
@@ -77,20 +77,6 @@ extern INT8 ir_binary_open(const UINT8 category, const UINT8 sub_category, UINT8
  */
 extern UINT16 ir_decode(UINT8 key_code, UINT16* user_data, t_remote_ac_status* ac_status, BOOL change_wind_direction);
 
-/**
- * function     ir_decode_d
- *
- * description: decode IR binary into digital NEC code
- *
- * parameters:  key_code (in) - the code of pressed key
- *              user_data (out) - output decoded data in INT16 array format
- *              ac_status(in) - pointer to AC status (optional)
- *              change_wind_direction (in) - if control changes wind direction for AC (for AC only)
- *
- * returns:     length of decoded data (0 indicates decode failure)
- */
-extern UINT16 ir_decode_d(UINT8 key_code, UINT16* user_data, t_remote_ac_status* ac_status, BOOL change_wind_direction);
-
 /**
  * function     ir_close
  *