diff --git a/src/websockets/qwebsocketprotocol.cpp b/src/websockets/qwebsocketprotocol.cpp

index df87a93..9556d18 100644

--- a/src/websockets/qwebsocketprotocol.cpp

+++ b/src/websockets/qwebsocketprotocol.cpp

@@ -38,6 +38,7 @@

 ****************************************************************************/

 #include "qwebsocketprotocol_p.h"

+#include <limits>

 #include <QtCore/QString>

 #include <QtCore/QSet>

 #include <QtCore/QtEndian>