Add import for dart:mirror
diff --git a/lib/mustache.dart b/lib/mustache.dart
index 3993230..ff98e45 100644
--- a/lib/mustache.dart
+++ b/lib/mustache.dart
@@ -1,5 +1,7 @@
 library mustache;
 
+import 'dart:mirrors';
+
 part 'char_reader.dart';
 part 'scanner.dart';
 part 'template.dart';