diff --git a/src/IPStackSimulator.cc b/src/IPStackSimulator.cc
index 693f77fd..d333d076 100644
--- a/src/IPStackSimulator.cc
+++ b/src/IPStackSimulator.cc
@@ -1,6 +1,7 @@
 #include "IPStackSimulator.hh"
 
 #include <stdint.h>
+#include <string.h>
 #include <netinet/in.h>
 #include <event2/buffer.h>
 #include <event2/bufferevent.h>