diff --git a/BaseTools/Source/Python/Common/Expression.py b/BaseTools/Source/Python/Common/Expression.py
index a19f35d991..74d1b08f76 100644
--- a/BaseTools/Source/Python/Common/Expression.py
+++ b/BaseTools/Source/Python/Common/Expression.py
@@ -857,8 +857,10 @@ class ValueExpressionEx(ValueExpression):
                                     ValueType = "UINT16"
                                 elif Item.startswith('UINT32'):
                                     ItemSize = 4
+                                    ValueType = "UINT32"
                                 elif Item.startswith('UINT64'):
                                     ItemSize = 8
+                                    ValueType = "UINT64"
                                 else:
                                     ItemSize = 0
                                 if ValueType: