diff --git a/BaseTools/Source/Python/build/build.py b/BaseTools/Source/Python/build/build.py
index 7436453582..bb70a5830c 100644
--- a/BaseTools/Source/Python/build/build.py
+++ b/BaseTools/Source/Python/build/build.py
@@ -2204,7 +2204,7 @@ def MyOptionParser():
     Parser.add_option("-y", "--report-file", action="store", dest="ReportFile", help="Create/overwrite the report to the specified filename.")
     Parser.add_option("-Y", "--report-type", action="append", type="choice", choices=['PCD','LIBRARY','FLASH','DEPEX','BUILD_FLAGS','FIXED_ADDRESS','HASH','EXECUTION_ORDER'], dest="ReportType", default=[],
         help="Flags that control the type of build report to generate.  Must be one of: [PCD, LIBRARY, FLASH, DEPEX, BUILD_FLAGS, FIXED_ADDRESS, HASH, EXECUTION_ORDER].  "\
-             "To specify more than one flag, repeat this option on the command line and the default flag set is [PCD, LIBRARY, FLASH, DEPEX, BUILD_FLAGS, FIXED_ADDRESS]")
+             "To specify more than one flag, repeat this option on the command line and the default flag set is [PCD, LIBRARY, FLASH, DEPEX, HASH, BUILD_FLAGS, FIXED_ADDRESS]")
     Parser.add_option("-F", "--flag", action="store", type="string", dest="Flag",
         help="Specify the specific option to parse EDK UNI file. Must be one of: [-c, -s]. -c is for EDK framework UNI file, and -s is for EDK UEFI UNI file. "\
              "This option can also be specified by setting *_*_*_BUILD_FLAGS in [BuildOptions] section of platform DSC. If they are both specified, this value "\