@@ -60,9 +60,9 @@
  * @param string The string containing the invalid JSON representation
  * @param line The line in which the parsing error was encountered
  * @return An initialized invalid JSON exception
  */
 - initWithString: (nullable OFString *)string
-	    line: (size_t)line;
+	    line: (size_t)line OF_DESIGNATED_INITIALIZER;
 @end
 
 OF_ASSUME_NONNULL_END