diff -Nurd qdigidoc_3.13.6.1525.orig/client/Application.cpp qdigidoc_3.13.6.1525/client/Application.cpp
--- qdigidoc_3.13.6.1525.orig/client/Application.cpp	2018-03-21 11:39:24.000000000 +0200
+++ qdigidoc_3.13.6.1525/client/Application.cpp	2018-06-01 17:37:26.000000000 +0300
@@ -57,6 +57,7 @@
 #include <QtWidgets/QMessageBox>
 #include <QtWidgets/QProgressBar>
 #include <QtWidgets/QProgressDialog>
+#include <QtWidgets/QAction>
 
 #if defined(Q_OS_MAC)
 #include <common/MacMenuBar.h>
diff -Nurd qdigidoc_3.13.6.1525.orig/client/MainWindow.cpp qdigidoc_3.13.6.1525/client/MainWindow.cpp
--- qdigidoc_3.13.6.1525.orig/client/MainWindow.cpp	2018-03-21 11:39:24.000000000 +0200
+++ qdigidoc_3.13.6.1525/client/MainWindow.cpp	2018-06-01 17:35:22.000000000 +0300
@@ -44,6 +44,8 @@
 #include <QtPrintSupport/QPrinter>
 #include <QtPrintSupport/QPrinterInfo>
 #include <QtPrintSupport/QPrintPreviewDialog>
+#include <QtWidgets/QActionGroup>
+#include <QtWidgets/QButtonGroup>
 #include <QtWidgets/QCompleter>
 #include <QtWidgets/QMessageBox>
 
diff -Nurd qdigidoc_3.13.6.1525.orig/client/MainWindow.h qdigidoc_3.13.6.1525/client/MainWindow.h
--- qdigidoc_3.13.6.1525.orig/client/MainWindow.h	2018-03-21 11:39:24.000000000 +0200
+++ qdigidoc_3.13.6.1525/client/MainWindow.h	2018-06-01 17:35:40.000000000 +0300
@@ -24,6 +24,7 @@
 #include <QtCore/QStringList>
 
 class DigiDoc;
+class QActionGroup;
 class QPrinter;
 
 class MainWindow: public QWidget, private Ui::MainWindow
diff -Nurd qdigidoc_3.13.6.1525.orig/common/qtsingleapplication/CMakeLists.txt qdigidoc_3.13.6.1525/common/qtsingleapplication/CMakeLists.txt
--- qdigidoc_3.13.6.1525.orig/common/qtsingleapplication/CMakeLists.txt	2018-03-21 11:39:24.000000000 +0200
+++ qdigidoc_3.13.6.1525/common/qtsingleapplication/CMakeLists.txt	2018-06-01 17:29:57.000000000 +0300
@@ -5,5 +5,5 @@
 set_target_properties( qtsingleapplication PROPERTIES AUTOMOC TRUE )
 
 if( Qt5Widgets_FOUND )
-	qt5_use_modules( qtsingleapplication Widgets Network )
+    target_link_libraries(qtsingleapplication Qt5::Widgets Qt5::Network)
 endif()
diff -Nurd qdigidoc_3.13.6.1525.orig/crypto/MainWindow.cpp qdigidoc_3.13.6.1525/crypto/MainWindow.cpp
--- qdigidoc_3.13.6.1525.orig/crypto/MainWindow.cpp	2018-03-21 11:39:24.000000000 +0200
+++ qdigidoc_3.13.6.1525/crypto/MainWindow.cpp	2018-06-01 17:31:24.000000000 +0300
@@ -35,6 +35,8 @@
 #include <QtGui/QDesktopServices>
 #include <QtGui/QDragEnterEvent>
 #include <QtNetwork/QSslKey>
+#include <QtWidgets/QActionGroup>
+#include <QtWidgets/QButtonGroup>
 #include <QtWidgets/QMessageBox>
 #include <QtWidgets/QProgressBar>
 #include <QtWidgets/QProgressDialog>
diff -Nurd qdigidoc_3.13.6.1525.orig/crypto/MainWindow.h qdigidoc_3.13.6.1525/crypto/MainWindow.h
--- qdigidoc_3.13.6.1525.orig/crypto/MainWindow.h	2018-03-21 11:39:24.000000000 +0200
+++ qdigidoc_3.13.6.1525/crypto/MainWindow.h	2018-06-01 17:32:33.000000000 +0300
@@ -21,6 +21,7 @@
 
 #include "ui_MainWindow.h"
 
+class QActionGroup;
 class CKey;
 class CryptoDoc;