diff --git a/ixwebsocket/IXHttpServer.cpp b/ixwebsocket/IXHttpServer.cpp
index bda1e5c4..78378b06 100644
--- a/ixwebsocket/IXHttpServer.cpp
+++ b/ixwebsocket/IXHttpServer.cpp
@@ -13,6 +13,7 @@
 #include <sstream>
 #include <vector>
 #include <zlib.h>
+#include <cstring>
 
 namespace
 {