Index: src/slic3r/GUI/GUI_Init.cpp
--- src/slic3r/GUI/GUI_Init.cpp.orig
+++ src/slic3r/GUI/GUI_Init.cpp
@@ -45,6 +45,10 @@ int GUI_Run(GUI_InitParams &params)
     signal(SIGCHLD, SIG_DFL);
 #endif // __APPLE__
 
+#ifdef __OpenBSD__
+    wxSizerFlags::DisableConsistencyChecks();
+#endif
+
     try {
         GUI::GUI_App* gui = new GUI::GUI_App(params.start_as_gcodeviewer ? GUI::GUI_App::EAppMode::GCodeViewer : GUI::GUI_App::EAppMode::Editor);
         if (gui->get_app_mode() != GUI::GUI_App::EAppMode::GCodeViewer) {
