Index: src/OFDictionary.m
==================================================================
--- src/OFDictionary.m
+++ src/OFDictionary.m
@@ -6,10 +6,12 @@
  *
  * This file is part of libobjfw. It may be distributed under the terms of the
  * Q Public License 1.0, which can be found in the file LICENSE included in
  * the packaging of this file.
  */
+
+#include <string.h>
 
 #import "OFDictionary.h"
 #import "OFExceptions.h"
 
 @implementation OFDictionary