diff --git a/Bootloaders/CDC/BootloaderCDC.c b/Bootloaders/CDC/BootloaderCDC.c
index 656f1e024a..f47fb1158a 100644
--- a/Bootloaders/CDC/BootloaderCDC.c
+++ b/Bootloaders/CDC/BootloaderCDC.c
@@ -237,7 +237,7 @@ static void ReadWriteMemoryBlock(const uint8_t Command)
 	uint16_t BlockSize;
 	char     MemoryType;
 
-	bool     HighByte = false;
+	uint8_t  HighByte = 0;
 	uint8_t  LowByte  = 0;
 
 	BlockSize  = (FetchNextCommandByte() << 8);