diff -Nru a/Dialogs/addaddressdialog.cpp b/Dialogs/addaddressdialog.cpp
--- a/Dialogs/addaddressdialog.cpp	2012-02-08 23:48:56.000000000 +0100
+++ b/Dialogs/addaddressdialog.cpp	2018-06-02 05:48:28.623643126 +0200
@@ -21,6 +21,7 @@
 #include "ui_addaddressdialog.h"
 
 #include <QRegExp>
+#include <QRegExpValidator>
 #include <QSqlRecord>
 #include <QSqlTableModel>
 #include <QDataWidgetMapper>
diff -Nru a/Dialogs/addcontactdialog.cpp b/Dialogs/addcontactdialog.cpp
--- a/Dialogs/addcontactdialog.cpp	2012-02-08 23:48:56.000000000 +0100
+++ b/Dialogs/addcontactdialog.cpp	2018-06-02 05:47:14.216159198 +0200
@@ -26,6 +26,7 @@
 //#include <QSqlError>
 #include <QDebug>
 //#include <QRegExp>
+#include <QRegExpValidator>
 #include <QSqlRecord>
 #include <QMessageBox>
 #include <QSqlField>
diff -Nru a/Dialogs/companydialog.cpp b/Dialogs/companydialog.cpp
--- a/Dialogs/companydialog.cpp	2012-02-08 23:48:56.000000000 +0100
+++ b/Dialogs/companydialog.cpp	2018-06-02 05:46:41.311945202 +0200
@@ -27,6 +27,7 @@
 
 #include <QDebug>
 #include <QMessageBox>
+#include <QRegExpValidator>
 #include <QSqlTableModel>
 #include <QDataWidgetMapper>
 #include <QItemSelectionModel>
diff -Nru a/Dialogs/editlabourchargedialog.cpp b/Dialogs/editlabourchargedialog.cpp
--- a/Dialogs/editlabourchargedialog.cpp	2012-02-08 23:48:56.000000000 +0100
+++ b/Dialogs/editlabourchargedialog.cpp	2018-06-02 05:42:51.233449139 +0200
@@ -24,6 +24,7 @@
 #include <QSqlRecord>
 #include <QSqlTableModel>
 #include <QDataWidgetMapper>
+#include <QRegExpValidator>
 
 EditLabourChargeDialog::EditLabourChargeDialog(DBaseCtrl *dbCtrl, QModelIndex labourIndex, QWidget *parent) :
     QDialog(parent),
diff -Nru a/Dialogs/editmaterialschargedialog.cpp b/Dialogs/editmaterialschargedialog.cpp
--- a/Dialogs/editmaterialschargedialog.cpp	2012-02-08 23:48:56.000000000 +0100
+++ b/Dialogs/editmaterialschargedialog.cpp	2018-06-02 05:44:21.172033895 +0200
@@ -18,6 +18,7 @@
 
 *******************************************************************************/
 
+#include <QRegExpValidator>
 #include "editmaterialschargedialog.h"
 #include "ui_editmaterialschargedialog.h"
 
diff -Nru a/Widgets/expenseswidget.cpp b/Widgets/expenseswidget.cpp
--- a/Widgets/expenseswidget.cpp	2012-02-08 23:48:56.000000000 +0100
+++ b/Widgets/expenseswidget.cpp	2018-06-02 05:46:03.913701995 +0200
@@ -21,6 +21,7 @@
 #include "expenseswidget.h"
 #include "ui_expenseswidget.h"
 
+#include <QRegExpValidator>
 #include <QSqlError>
 #include <QSqlTableModel>
 #include <QDataWidgetMapper>