diff --git a/BaseTools/Source/Python/Workspace/BuildClassObject.py b/BaseTools/Source/Python/Workspace/BuildClassObject.py
index 1c2385f761..b82af49236 100644
--- a/BaseTools/Source/Python/Workspace/BuildClassObject.py
+++ b/BaseTools/Source/Python/Workspace/BuildClassObject.py
@@ -222,6 +222,7 @@ class PcdClassObject(object):
         new_pcd.DefaultValue = self.DefaultValue
         new_pcd.TokenValue = self.TokenValue
         new_pcd.MaxDatumSize = self.MaxDatumSize
+        new_pcd.MaxSizeUserSet = self.MaxSizeUserSet
 
         new_pcd.Phase = self.Phase
         new_pcd.Pending = self.Pending