diff --git a/src/plugins/codeeditor/gui/tabbar.cpp b/src/plugins/codeeditor/gui/tabbar.cpp
index 7344b8e23..3cbbc78ce 100644
--- a/src/plugins/codeeditor/gui/tabbar.cpp
+++ b/src/plugins/codeeditor/gui/tabbar.cpp
@@ -19,6 +19,7 @@
 #include <QGuiApplication>
 
 DWIDGET_USE_NAMESPACE
+DGUI_USE_NAMESPACE
 
 TabBarPrivate::TabBarPrivate(TabBar *qq)
     : QObject(qq),
diff --git a/src/plugins/find/maincontroller/worker/searchreplaceworker_p.h b/src/plugins/find/maincontroller/worker/searchreplaceworker_p.h
index 3828c0438..b4cfc51f3 100644
--- a/src/plugins/find/maincontroller/worker/searchreplaceworker_p.h
+++ b/src/plugins/find/maincontroller/worker/searchreplaceworker_p.h
@@ -8,6 +8,7 @@
 #include "searchreplaceworker.h"
 
 #include "services/editor/editorservice.h"
+#include <optional>
 
 class SearchReplaceWorkerPrivate : public QObject
 {