diff --git a/gen_input/templates/CORENAME.h.gtl b/gen_input/templates/CORENAME.h.gtl
index 9c8082e..83fb8e1 100644
--- a/gen_input/templates/CORENAME.h.gtl
+++ b/gen_input/templates/CORENAME.h.gtl
@@ -30,8 +30,6 @@
  *
  *******************************************************************************/
 <%
-import com.minres.coredsl.util.BigIntegerWithRadix
-
 def nativeTypeSize(int size){
     if(size<=8) return 8; else if(size<=16) return 16; else if(size<=32) return 32; else return 64;
 }
@@ -57,10 +55,7 @@ def byteSize(int size){
     return 128;
 }
 def getCString(def val){
-    if(val instanceof BigIntegerWithRadix)
-        return ((BigIntegerWithRadix)val).toCString()
-    else
-        return val.toString()
+    return val.toString()
 }
 %>
 #ifndef _${coreDef.name.toUpperCase()}_H_
diff --git a/gen_input/templates/interp/CORENAME.cpp.gtl b/gen_input/templates/interp/CORENAME.cpp.gtl
index ef645bf..acf7afd 100644
--- a/gen_input/templates/interp/CORENAME.cpp.gtl
+++ b/gen_input/templates/interp/CORENAME.cpp.gtl
@@ -30,8 +30,6 @@
  *
  *******************************************************************************/
 <%
-import com.minres.coredsl.util.BigIntegerWithRadix
-
 def nativeTypeSize(int size){
     if(size<=8) return 8; else if(size<=16) return 16; else if(size<=32) return 32; else return 64;
 }