diff --git a/src/slic3r/GUI/NotificationManager.hpp b/src/slic3r/GUI/NotificationManager.hpp
index b347c9dfe..2bc9aaaab 100644
--- a/src/slic3r/GUI/NotificationManager.hpp
+++ b/src/slic3r/GUI/NotificationManager.hpp
@@ -391,7 +391,7 @@ private:
 	{
 	public:
 		
-		ProgressBarNotification(const NotificationData& n, NotificationIDProvider& id_provider, wxEvtHandler* evt_handler, float percentage) : PopNotification(n, id_provider, evt_handler) { set_percentage(percentage); }
+		ProgressBarNotification(const NotificationData& n, NotificationIDProvider& id_provider, wxEvtHandler* evt_handler, float percentage) : PopNotification(n, id_provider, evt_handler) { }
 		virtual void set_percentage(float percent) { m_percentage = percent; }
 	protected:
 		virtual void init() override;
@@ -434,6 +434,7 @@ private:
 			, m_file_size(filesize)
 		{
 			m_has_cancel_button = true;
+			set_percentage(percentage);
 		}
 		static std::string	get_upload_job_text(int id, const std::string& filename, const std::string& host) { return /*"[" + std::to_string(id) + "] " + */filename + " -> " + host; }
 		void				set_percentage(float percent) override;