diff --git a/src/GUI/GUI.hpp b/src/GUI/GUI.hpp
index e6c89b90f..82d6de746 100644
--- a/src/GUI/GUI.hpp
+++ b/src/GUI/GUI.hpp
@@ -3,6 +3,7 @@
 #include "MainFrame.hpp"
 #include "Notifier.hpp"
 #include <string>
+#include  <vector>
 
 namespace Slic3r { namespace GUI {