diff --git a/conf/cf-lex.l b/conf/cf-lex.l
index a30ddfbd..27ea86eb 100644
--- a/conf/cf-lex.l
+++ b/conf/cf-lex.l
@@ -349,6 +349,8 @@ cf_symbol_class_name(struct symbol *sym)
       return "filter";
     case SYM_TABLE:
       return "routing table";
+    case SYM_IPA:
+      return "network address";
     default:
       return "unknown type";
     }
diff --git a/conf/conf.h b/conf/conf.h
index b8bfd947..24e3217d 100644
--- a/conf/conf.h
+++ b/conf/conf.h
@@ -81,6 +81,7 @@ struct symbol {
   char name[1];
 };
 
+/* Remember to update cf_symbol_class_name() */
 #define SYM_VOID 0
 #define SYM_PROTO 1
 #define SYM_NUMBER 2