@@ -35,11 +35,11 @@
 }
 
 /*!
  * The MessagePack extension type.
  */
-@property (readonly) int8_t type;
+@property (readonly, nonatomic) int8_t type;
 
 /*!
  * @return The data of the extension.
  */
 @property (readonly, nonatomic) OFDataArray *data;