Index: src/OFConstString.h
==================================================================
--- src/OFConstString.h
+++ src/OFConstString.h
@@ -9,16 +9,12 @@
  * the packaging of this file.
  */
 
 #import "OFObject.h"
 
-#if !defined(__objc_INCLUDE_GNU) && !defined(OFCONSTSTRING_M)
-/*
- * This way, projects using libobjfw don't need -Wno-deprecated-declarations on
- * OS X 10.5.
- */
-extern void _OFConstStringClassReference;
+#ifndef __objc_INCLUDE_GNU
+extern void *_OFConstStringClassReference;
 #endif
 
 /**
  * A class for storing static strings using the @"" literal.
  */

Index: src/OFConstString.m
==================================================================
--- src/OFConstString.m
+++ src/OFConstString.m
@@ -13,11 +13,10 @@
 
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
-#define OFCONSTSTRING_M
 #import "OFConstString.h"
 #import "OFString.h"
 #import "OFExceptions.h"
 #import "OFMacros.h"