Index: src/slic3r/GUI/ConfigWizard.cpp
--- src/slic3r/GUI/ConfigWizard.cpp.orig
+++ src/slic3r/GUI/ConfigWizard.cpp
@@ -50,7 +50,7 @@
 #include "UnsavedChangesDialog.hpp"
 #include "MainFrame.hpp"
 
-#if defined(__linux__) && defined(__WXGTK3__)
+#if (defined(__linux__) || defined(__OpenBSD__)) && defined(__WXGTK3__)
 #define wxLinux_gtk3 true
 #else
 #define wxLinux_gtk3 false
