diff --git a/BaseTools/Source/Python/AutoGen/GenC.py b/BaseTools/Source/Python/AutoGen/GenC.py
index ae191d8c13..67aaef70a1 100644
--- a/BaseTools/Source/Python/AutoGen/GenC.py
+++ b/BaseTools/Source/Python/AutoGen/GenC.py
@@ -1226,7 +1226,7 @@ def CreateLibraryPcdCode(Info, AutoGenC, AutoGenH, Pcd):
         AutoGenH.Append('//#define %s  ASSERT(FALSE)  // It is not allowed to set value for a FIXED_AT_BUILD PCD\n' % SetModeName)
         
         if PcdItemType == TAB_PCDS_FIXED_AT_BUILD and (key in Info.ConstPcd or (Info.IsLibrary and not Info._ReferenceModules)):
-            if DatumType == 'VOID*':
+            if  Pcd.DatumType == 'VOID*':
                 AutoGenH.Append('#define _PCD_VALUE_%s %s%s\n' %(TokenCName, Type, PcdVariableName))
             else:
                 AutoGenH.Append('#define _PCD_VALUE_%s %s\n' %(TokenCName, Pcd.DefaultValue))