diff --git a/assets/parser.d.erb b/assets/parser.d.erb
index 87e1f18..4bcca7e 100644
--- a/assets/parser.d.erb
+++ b/assets/parser.d.erb
@@ -4,4 +4,10 @@ module <%= @grammar.modulename %>;
 <% end %>
 class <%= classname %>
 {
+    enum
+    {
+<% @grammar.tokens.each do |token| %>
+        TOKEN_<%= token.c_name %>,
+<% end %>
+    }
 }
diff --git a/lib/imbecile/grammar/token.rb b/lib/imbecile/grammar/token.rb
index 573744f..aa3fc23 100644
--- a/lib/imbecile/grammar/token.rb
+++ b/lib/imbecile/grammar/token.rb
@@ -28,6 +28,10 @@ module Imbecile
         @nfa = regex.nfa
       end
 
+      def c_name
+        @name.upcase
+      end
+
       def to_s
         @name
       end