diff --git a/src/slic3r/GUI/Gizmos/GLGizmoFlatten.cpp b/src/slic3r/GUI/Gizmos/GLGizmoFlatten.cpp
index ab174c39a..c02b64df6 100644
--- a/src/slic3r/GUI/Gizmos/GLGizmoFlatten.cpp
+++ b/src/slic3r/GUI/Gizmos/GLGizmoFlatten.cpp
@@ -7,6 +7,8 @@
 #include "libslic3r/Geometry/ConvexHull.hpp"
 #include "libslic3r/Model.hpp"
 
+#include <wx/display.h>
+
 #include <numeric>
 #include <imgui/imgui_internal.h>
 #include <GL/glew.h>