diff --git a/src/plugins/cmakeprojectmanager/cmakekitconfigwidget.h b/src/plugins/cmakeprojectmanager/cmakekitconfigwidget.h
index 48ccf1673a8..3839750f664 100644
--- a/src/plugins/cmakeprojectmanager/cmakekitconfigwidget.h
+++ b/src/plugins/cmakeprojectmanager/cmakekitconfigwidget.h
@@ -29,6 +29,7 @@
 
 QT_BEGIN_NAMESPACE
 class QComboBox;
+class QDialog;
 class QLabel;
 class QPlainTextEdit;
 class QPushButton;