diff --git a/BaseTools/Source/Python/Common/Expression.py b/BaseTools/Source/Python/Common/Expression.py
index 8e1a9866e1..320f001500 100644
--- a/BaseTools/Source/Python/Common/Expression.py
+++ b/BaseTools/Source/Python/Common/Expression.py
@@ -835,7 +835,7 @@ class ValueExpressionEx(ValueExpression):
                         elif Item.startswith('UINT64'):
                             ItemSize = 8
                             ValueType = 'UINT64'
-                        elif Item.startswith('"') or Item.startswith("'") or Item.startswith('L'):
+                        elif Item[0] in ['"',"'",'L']:
                             ItemSize = 0
                             ValueType = 'VOID*'
                         else: