diff --git a/FLASH_PROGRAM/F4 SERIES/FLASH_SECTOR_F4.h b/FLASH_PROGRAM/F4 SERIES/FLASH_SECTOR_F4.h
index 9b715c8..e59ab4a 100644
--- a/FLASH_PROGRAM/F4 SERIES/FLASH_SECTOR_F4.h	
+++ b/FLASH_PROGRAM/F4 SERIES/FLASH_SECTOR_F4.h	
@@ -29,5 +29,6 @@ void Flash_Write_NUM (uint32_t StartSectorAddress, float Num);
 
 float Flash_Read_NUM (uint32_t StartSectorAddress);
 
+void Convert_To_Byte (uint32_t *Data, int numberofbytes, uint8_t *Buf);
 
 #endif /* INC_FLASH_SECTOR_F4_H_ */