@@ -46,11 +46,11 @@
  * @param length The length of the data that has been read
  * @param exception An exception which occurred while reading or nil on success
  * @return A bool whether the same block should be used for the next read
  */
 typedef bool (^of_stream_async_read_block_t)(OFStream *stream, void *buffer,
-    size_t length, __nullable OFException *exception);
+    size_t length, OFException *OF_NULLABLE exception);
 
 /*!
  * @brief A block which is called when a line was read from the stream.
  *
  * @param stream The stream on which a line was read
@@ -58,11 +58,11 @@
  *	       occurred
  * @param exception An exception which occurred while reading or nil on success
  * @return A bool whether the same block should be used for the next read
  */
 typedef bool (^of_stream_async_read_line_block_t)(OFStream *stream,
-    __nullable OFString *line, __nullable OFException *exception);
+    OFString *OF_NULLABLE line, OFException *OF_NULLABLE exception);
 #endif
 
 /*!
  * @class OFStream OFStream.h ObjFW/OFStream.h
  *