@@ -39,23 +39,23 @@
 /*! @file */
 
 /*!
  * @brief The standard input as an OFStream.
  */
-extern __nullable OFStdIOStream *of_stdin;
+extern OFStdIOStream *OF_NULLABLE of_stdin;
 
 /*!
  * @brief The standard output as an OFStream.
  */
-extern __nullable OFStdIOStream *of_stdout;
+extern OFStdIOStream *OF_NULLABLE of_stdout;
 
 /*!
  * @brief The standard error as an OFStream.
  */
-extern __nullable OFStdIOStream *of_stderr;
+extern OFStdIOStream *OF_NULLABLE of_stderr;
 
 extern void of_log(OFConstantString*, ...);
 #ifdef __cplusplus
 }
 #endif
 
 OF_ASSUME_NONNULL_END