diff --git a/BaseTools/Source/Python/Common/Expression.py b/BaseTools/Source/Python/Common/Expression.py
index 4860ace11a..138b38c927 100644
--- a/BaseTools/Source/Python/Common/Expression.py
+++ b/BaseTools/Source/Python/Common/Expression.py
@@ -1027,6 +1027,8 @@ class ValueExpressionEx(ValueExpression):
 
                             if Size > 0:
                                 PcdValue = '{' + ', '.join(AllPcdValueList) + '}'
+                            else:
+                                raise BadExpression("PCD with value '%s' cannot be used. Please provide a valid value of at least one byte." % (self.PcdValue))
                         else:
                             raise  BadExpression("Type: %s, Value: %s, %s"%(self.PcdType, PcdValue, Value))