diff --git a/src/gui/rhi/qdxgivsyncservice.cpp b/src/gui/rhi/qdxgivsyncservice.cpp
index 40e87f030ed..ce4a37f055e 100644
--- a/src/gui/rhi/qdxgivsyncservice.cpp
+++ b/src/gui/rhi/qdxgivsyncservice.cpp
@@ -8,6 +8,7 @@
 #include <QCoreApplication>
 #include <QLoggingCategory>
 #include <QScreen>
+#include <QVarLengthArray>
 #include <QtCore/private/qsystemerror_p.h>
 
 QT_BEGIN_NAMESPACE
diff --git a/src/gui/rhi/qdxgivsyncservice_p.h b/src/gui/rhi/qdxgivsyncservice_p.h
index e9b4145afb1..6de729eec5b 100644
--- a/src/gui/rhi/qdxgivsyncservice_p.h
+++ b/src/gui/rhi/qdxgivsyncservice_p.h
@@ -17,6 +17,7 @@
 
 #include <QWindow>
 #include <QMutex>
+#include <QHash>
 
 #include <dxgi1_6.h>