revert another const for backward compatibility
diff --git a/src/packages/xdc/runtime/Types.xdc b/src/packages/xdc/runtime/Types.xdc
index 140b454..2b4191e 100644
--- a/src/packages/xdc/runtime/Types.xdc
+++ b/src/packages/xdc/runtime/Types.xdc
@@ -548,7 +548,8 @@
      *  Header for all module vtables
      */
     struct Base {
-        const Base *base;     /* points to inherited interface base */
+        //490928 const Base *base;     /* points to inherited interface base */
+        Base *base;     /* points to inherited interface base */
     }
 
     /*