Index: src/OFSocketObserver.m
==================================================================
--- src/OFSocketObserver.m
+++ src/OFSocketObserver.m
@@ -8,10 +8,12 @@
  * Q Public License 1.0, which can be found in the file LICENSE included in
  * the packaging of this file.
  */
 
 #include "config.h"
+
+#include <string.h>
 
 #ifdef OF_HAVE_POLL
 # include <poll.h>
 #endif