diff -ura qdigidoc4_4.0.0.orig/client/dialogs/PinUnblock.cpp qdigidoc4_4.0.0.new/client/dialogs/PinUnblock.cpp
--- qdigidoc4_4.0.0.orig/client/dialogs/PinUnblock.cpp	2018-07-17 16:53:37.108279016 +0100
+++ qdigidoc4_4.0.0.new/client/dialogs/PinUnblock.cpp	2018-07-17 16:54:20.769255458 +0100
@@ -25,6 +25,7 @@
 
 #include <QLabel>
 #include <QList>
+#include <QtGui/QRegExpValidator>
 
 
 struct InfoLine
diff -ura qdigidoc4_4.0.0.orig/client/dialogs/Updater.cpp qdigidoc4_4.0.0.new/client/dialogs/Updater.cpp
--- qdigidoc4_4.0.0.orig/client/dialogs/Updater.cpp	2018-07-17 16:53:37.108279016 +0100
+++ qdigidoc4_4.0.0.new/client/dialogs/Updater.cpp	2018-07-17 16:54:20.769255458 +0100
@@ -41,6 +41,7 @@
 #include <QtNetwork/QNetworkReply>
 #include <QtNetwork/QSslKey>
 #include <QtGui/QPainter>
+#include <QtGui/QRegExpValidator>
 #include <QtWidgets/QPushButton>
 
 #include <openssl/evp.h>
diff -ura qdigidoc4_4.0.0.orig/client/widgets/OtherData.cpp qdigidoc4_4.0.0.new/client/widgets/OtherData.cpp
--- qdigidoc4_4.0.0.orig/client/widgets/OtherData.cpp	2018-07-17 16:52:59.297433337 +0100
+++ qdigidoc4_4.0.0.new/client/widgets/OtherData.cpp	2018-07-17 16:54:20.769255458 +0100
@@ -21,6 +21,8 @@
 #include "ui_OtherData.h"
 #include "Styles.h"
 
+#include <QStyleOption>
+
 OtherData::OtherData(QWidget *parent)
 : QWidget(parent)
 , ui(new Ui::OtherData)
diff -ura qdigidoc4_4.0.0.orig/common/qtsingleapplication/CMakeLists.txt qdigidoc4_4.0.0.new/common/qtsingleapplication/CMakeLists.txt
--- qdigidoc4_4.0.0.orig/common/qtsingleapplication/CMakeLists.txt	2018-07-17 16:53:39.498332469 +0100
+++ qdigidoc4_4.0.0.new/common/qtsingleapplication/CMakeLists.txt	2018-07-17 16:54:30.429490042 +0100
@@ -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()