@@ -36,11 +36,11 @@
 @property OF_NULLABLE_PROPERTY (readonly, nonatomic) OFString *string;
 
 /*!
  * The line in which parsing the JSON representation failed.
  */
-@property (readonly) size_t line;
+@property (readonly, nonatomic) size_t line;
 
 + (instancetype)exception OF_UNAVAILABLE;
 
 /*!
  * @brief Creates a new, autoreleased invalid JSON exception.