diff --git a/src/slic3r/GUI/ImGuiWrapper.hpp b/src/slic3r/GUI/ImGuiWrapper.hpp
index a56af2236..acad85c27 100644
--- a/src/slic3r/GUI/ImGuiWrapper.hpp
+++ b/src/slic3r/GUI/ImGuiWrapper.hpp
@@ -6,6 +6,8 @@
 
 #include <imgui/imgui.h>
 
+#include <wx/string.h>
+
 #include "libslic3r/Point.hpp"
 
 namespace Slic3r {namespace Search {