@@ -92,11 +92,12 @@
     OFCopying>
 {
 #if !defined(OF_SEEKABLE_STREAM_M) && !defined(OF_TCP_SOCKET_M)
 @private
 #endif
-	char *_readBuffer, *_readBufferMemory, *_writeBuffer;
+	char *_Nullable _readBuffer, *_Nullable _readBufferMemory;
+	char *_Nullable _writeBuffer;
 	size_t _readBufferLength, _writeBufferLength;
 	bool _writeBuffered, _waitingForDelimiter;
 @protected
 	bool _blocking;
 }