diff --git a/src/slic3r/GUI/GUI_App.cpp b/src/slic3r/GUI/GUI_App.cpp
index 6362dc609..c25f06ff6 100644
--- a/src/slic3r/GUI/GUI_App.cpp
+++ b/src/slic3r/GUI/GUI_App.cpp
@@ -1868,7 +1868,7 @@ void GUI_App::import_model(wxWindow *parent, wxArrayString& input_files) const
 {
     input_files.Clear();
     wxFileDialog dialog(parent ? parent : GetTopWindow(),
-        _L("Choose one or more files (STL/OBJ/AMF/3MF/PRUSA):"),
+        _L("Choose one or more files (STL/OBJ/AMF/3MF/PRUSA/STEP):"),
         from_u8(app_config->get_last_dir()), "",
         file_wildcards(FT_MODEL), wxFD_OPEN | wxFD_MULTIPLE | wxFD_FILE_MUST_EXIST);