diff --git a/compiler/cpp/src/generate/t_cocoa_generator.cc b/compiler/cpp/src/generate/t_cocoa_generator.cc
index 48c853c..aefb6a6 100644
--- a/compiler/cpp/src/generate/t_cocoa_generator.cc
+++ b/compiler/cpp/src/generate/t_cocoa_generator.cc
@@ -338,7 +338,7 @@
   std::ostringstream const_interface;
   string constants_class_name = cocoa_prefix_ + program_name_ + "Constants";
 
-  const_interface << "@interface " << constants_class_name << " ";
+  const_interface << "@interface " << constants_class_name << " : NSObject ";
   scope_up(const_interface);
   scope_down(const_interface);