diff --git a/sources/editor/ui/qetelementeditor.h b/sources/editor/ui/qetelementeditor.h
index ee0b5a221..faae89aed 100644
--- a/sources/editor/ui/qetelementeditor.h
+++ b/sources/editor/ui/qetelementeditor.h
@@ -18,9 +18,11 @@
 #ifndef QETELEMENTEDITOR_H
 #define QETELEMENTEDITOR_H
 
-#include <QMainWindow>
 #include "../../ElementsCollection/elementslocation.h"
 
+#include <QCloseEvent>
+#include <QMainWindow>
+
 class ElementScene;
 class QActionGroup;
 class ElementItemEditor;
diff --git a/sources/projectview.h b/sources/projectview.h
index df84f9e48..ba037761b 100644
--- a/sources/projectview.h
+++ b/sources/projectview.h
@@ -21,6 +21,7 @@
 #include "qetresult.h"
 #include "titleblock/templatelocation.h"
 
+#include <QCloseEvent>
 #include <QTabBar>
 #include <QWidget>
 #include <QtWidgets>
diff --git a/sources/qetdiagrameditor.h b/sources/qetdiagrameditor.h
index 912fe7782..db17ea877 100644
--- a/sources/qetdiagrameditor.h
+++ b/sources/qetdiagrameditor.h
@@ -22,6 +22,7 @@
 #include "qetmainwindow.h"
 
 #include <QActionGroup>
+#include <QCloseEvent>
 #include <QDir>
 #include <QMdiArea>
 #include <QSignalMapper>
diff --git a/sources/titleblock/qettemplateeditor.h b/sources/titleblock/qettemplateeditor.h
index 87ae6e7fd..7f930dae9 100644
--- a/sources/titleblock/qettemplateeditor.h
+++ b/sources/titleblock/qettemplateeditor.h
@@ -22,6 +22,7 @@
 #include "templatelocation.h"
 #include "templateview.h"
 
+#include <QCloseEvent>
 #include <QtWidgets>
 class ModifyTitleBlockCellCommand;
 class TitleBlockTemplateCommand;