diff --git a/src/platform/qt/VFileDevice.h b/src/platform/qt/VFileDevice.h
index 16e9ad5ae..f59a7def6 100644
--- a/src/platform/qt/VFileDevice.h
+++ b/src/platform/qt/VFileDevice.h
@@ -28,7 +28,7 @@ protected:
 	virtual qint64 size() const override;
 
 private:
-	mutable VFile* m_vf;
+	VFile* m_vf;
 };
 
 }