diff --git a/src/GUI/misc_ui.hpp b/src/GUI/misc_ui.hpp
index 90ad19070..eebefd015 100644
--- a/src/GUI/misc_ui.hpp
+++ b/src/GUI/misc_ui.hpp
@@ -15,6 +15,11 @@
 
 #include "Log.hpp"
 
+
+/// Macro to build std::wstring that slic3r::log expects using << syntax of wxString
+/// Avoids wx pollution of libslic3r
+#define LOG_WSTRING(...) ((wxString("") << __VA_ARGS__).ToStdWstring())
+
 /// Common static (that is, free-standing) functions, not part of an object hierarchy.
 
 namespace Slic3r { namespace GUI {