diff --git a/compiler/cpp/src/main.cc b/compiler/cpp/src/main.cc
index 7e561e1..b070b3b 100644
--- a/compiler/cpp/src/main.cc
+++ b/compiler/cpp/src/main.cc
@@ -614,7 +614,7 @@
       }
       break;
     default:
-      throw "compiler error: no const of base type " + tbase + name;
+      throw "compiler error: no const of base type " + t_base_type::t_base_name(tbase) + name;
     }
   } else if (type->is_enum()) {
     if (value->get_type() != t_const_value::CV_INTEGER) {