Index: src/OFHMAC.m
==================================================================
--- src/OFHMAC.m
+++ src/OFHMAC.m
@@ -11,10 +11,12 @@
  * Alternatively, it may be distributed under the terms of the GNU General
  * Public License, either version 2 or 3, which can be found in the file
  * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
  * file.
  */
+
+#include "config.h"
 
 #import "OFHMAC.h"
 
 #import "OFHashAlreadyCalculatedException.h"
 #import "OFInvalidArgumentException.h"

Index: src/OFMutablePair.m
==================================================================
--- src/OFMutablePair.m
+++ src/OFMutablePair.m
@@ -11,10 +11,12 @@
  * Alternatively, it may be distributed under the terms of the GNU General
  * Public License, either version 2 or 3, which can be found in the file
  * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
  * file.
  */
+
+#include "config.h"
 
 #import "OFMutablePair.h"
 
 @implementation OFMutablePair
 @dynamic firstObject, secondObject;

Index: src/OFMutableTriple.m
==================================================================
--- src/OFMutableTriple.m
+++ src/OFMutableTriple.m
@@ -11,10 +11,12 @@
  * Alternatively, it may be distributed under the terms of the GNU General
  * Public License, either version 2 or 3, which can be found in the file
  * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
  * file.
  */
+
+#include "config.h"
 
 #import "OFMutableTriple.h"
 
 @implementation OFMutableTriple
 @dynamic firstObject, secondObject, thirdObject;

Index: src/OFPair.m
==================================================================
--- src/OFPair.m
+++ src/OFPair.m
@@ -11,10 +11,12 @@
  * Alternatively, it may be distributed under the terms of the GNU General
  * Public License, either version 2 or 3, which can be found in the file
  * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
  * file.
  */
+
+#include "config.h"
 
 #import "OFPair.h"
 #import "OFString.h"
 
 @implementation OFPair

Index: src/OFSandbox.m
==================================================================
--- src/OFSandbox.m
+++ src/OFSandbox.m
@@ -11,10 +11,12 @@
  * Alternatively, it may be distributed under the terms of the GNU General
  * Public License, either version 2 or 3, which can be found in the file
  * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
  * file.
  */
+
+#include "config.h"
 
 #import "OFSandbox.h"
 #import "OFString.h"
 #import "OFArray.h"
 

Index: src/OFTriple.m
==================================================================
--- src/OFTriple.m
+++ src/OFTriple.m
@@ -11,10 +11,12 @@
  * Alternatively, it may be distributed under the terms of the GNU General
  * Public License, either version 2 or 3, which can be found in the file
  * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
  * file.
  */
+
+#include "config.h"
 
 #import "OFTriple.h"
 #import "OFString.h"
 
 @implementation OFTriple