diff --git a/assets/parser.d.erb b/assets/parser.d.erb
index 4e17c87..3bda15c 100644
--- a/assets/parser.d.erb
+++ b/assets/parser.d.erb
@@ -360,7 +360,7 @@ class <%= @classname %>
                 }
                 else if (attempt_match_info.length == 0u)
                 {
-                    result.token = TOKEN_0EOF;
+                    result.token = TOKEN___EOF;
                     result.type = Result.Type.TOKEN;
                     return;
                 }
@@ -471,7 +471,7 @@ class <%= @classname %>
                 if (shift_state == 0xFFFFFFFFu)
                 {
                     shift_state = check_shift(statevalues[$-1].state, token);
-                    if ((shift_state != 0xFFFFFFFFu) && (token == TOKEN_0EOF))
+                    if ((shift_state != 0xFFFFFFFFu) && (token == TOKEN___EOF))
                     {
                         /* Successful parse. */
                         parse_result = statevalues[$-1].pvalue;
diff --git a/lib/propane/token.rb b/lib/propane/token.rb
index 0bf91e5..68c1542 100644
--- a/lib/propane/token.rb
+++ b/lib/propane/token.rb
@@ -9,7 +9,7 @@ class Propane
       # @return [String]
       #   Name of the token to use in code (special characters replaced).
       def code_name(name)
-        name.sub(/^\$/, "0")
+        name.sub(/^\$/, "__")
       end
 
     end
diff --git a/spec/test_d_lexer.d b/spec/test_d_lexer.d
index 16deb0c..7e40412 100644
--- a/spec/test_d_lexer.d
+++ b/spec/test_d_lexer.d
@@ -45,8 +45,8 @@ unittest
     assert(lexer.lex_token() == Result(Result.Type.TOKEN, 1, 0, 3, Testparser.TOKEN_int));
     assert(lexer.lex_token() == Result(Result.Type.TOKEN, 1, 4, 1, Testparser.TOKEN_plus));
     assert(lexer.lex_token() == Result(Result.Type.TOKEN, 1, 6, 3, Testparser.TOKEN_int));
-    assert(lexer.lex_token() == Result(Result.Type.TOKEN, 1, 9, 0, Testparser.TOKEN_0EOF));
+    assert(lexer.lex_token() == Result(Result.Type.TOKEN, 1, 9, 0, Testparser.TOKEN___EOF));
 
     lexer = new Testparser.Lexer("");
-    assert(lexer.lex_token() == Result(Result.Type.TOKEN, 0, 0, 0, Testparser.TOKEN_0EOF));
+    assert(lexer.lex_token() == Result(Result.Type.TOKEN, 0, 0, 0, Testparser.TOKEN___EOF));
 }