diff --git a/src/plugins/classview/classviewnavigationwidget.cpp b/src/plugins/classview/classviewnavigationwidget.cpp
index 1b304a87bc8..491629e23c6 100644
--- a/src/plugins/classview/classviewnavigationwidget.cpp
+++ b/src/plugins/classview/classviewnavigationwidget.cpp
@@ -34,9 +34,11 @@
 #include "classviewutils.h"
 #include "classviewconstants.h"
 
+#include <utils/navigationtreeview.h>
 #include <utils/qtcassert.h>
 
 #include <QDebug>
+#include <QVBoxLayout>
 
 enum { debug = false };
 
diff --git a/src/plugins/classview/classviewnavigationwidget.h b/src/plugins/classview/classviewnavigationwidget.h
index 5016d027f9a..333eb9ea36d 100644
--- a/src/plugins/classview/classviewnavigationwidget.h
+++ b/src/plugins/classview/classviewnavigationwidget.h
@@ -32,17 +32,15 @@
 
 #include "classviewtreeitemmodel.h"
 
-#include <utils/navigationtreeview.h>
-
 #include <QList>
-#include <QSharedPointer>
-
 #include <QPointer>
+#include <QSharedPointer>
 #include <QStandardItem>
 #include <QToolButton>
-#include <QVBoxLayout>
 #include <QWidget>
 
+namespace Utils { class NavigationTreeView; }
+
 namespace ClassView {
 namespace Internal {