diff --git a/MdeModulePkg/Universal/Network/UefiPxeBcDxe/PxeBcMtftp.c b/MdeModulePkg/Universal/Network/UefiPxeBcDxe/PxeBcMtftp.c
index 6eb0e64be0..8ea6fed516 100644
--- a/MdeModulePkg/Universal/Network/UefiPxeBcDxe/PxeBcMtftp.c
+++ b/MdeModulePkg/Universal/Network/UefiPxeBcDxe/PxeBcMtftp.c
@@ -14,7 +14,7 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 
 #include "PxeBcImpl.h"
 
-UINT8 *mMtftpOptions[PXE_MTFTP_OPTION_MAXIMUM_INDEX] = {
+CHAR8 *mMtftpOptions[PXE_MTFTP_OPTION_MAXIMUM_INDEX] = {
   "blksize",
   "timeout",
   "tsize",