--- include/QtCrypto/orig.qca_core.h	2014-11-06 09:15:45.000000000 +0100
+++ include/QtCrypto/qca_core.h	2015-10-05 15:33:26.000000000 +0200
@@ -38,6 +38,7 @@
 #include <QList>
 #include <QSharedData>
 #include <QSharedDataPointer>
+#include <QIODevice>
 #include "qca_export.h"
 #include "qca_support.h"
 #include "qca_tools.h"