1 files changed, 3 insertions, 1 deletions
diff --git a/BaseTools/Source/Python/GenFds/DataSection.py b/BaseTools/Source/Python/GenFds/DataSection.py
index 60b94fbe08..f20fd70225 100644
--- a/BaseTools/Source/Python/GenFds/DataSection.py
+++ b/BaseTools/Source/Python/GenFds/DataSection.py
@@ -44,10 +44,12 @@ class DataSection (DataSectionClassObject):
     #   @param  Dict        dictionary contains macro and its value
     #   @retval tuple       (Generated file name list, section alignment)
     #
-    def GenSection(self, OutputPath, ModuleName, SecNum, keyStringList, FfsFile = None, Dict = {}, IsMakefile = False):
+    def GenSection(self, OutputPath, ModuleName, SecNum, keyStringList, FfsFile = None, Dict = None, IsMakefile = False):
         #
         # Prepare the parameter of GenSection
         #
+        if Dict is None:
+            Dict = {}
         if FfsFile is not None:
             self.SectFileName = GenFdsGlobalVariable.ReplaceWorkspaceMacro(self.SectFileName)
             self.SectFileName = GenFdsGlobalVariable.MacroExtend(self.SectFileName, Dict, FfsFile.CurrentArch)