diff --git a/README.md b/README.md
index dcfff3d5..eb4019a8 100644
--- a/README.md
+++ b/README.md
@@ -9,5 +9,6 @@ If you are interested in contributing to this library, please ask for write acce
 on this FreeCAD forum thread: https://sourceforge.net/apps/phpbb/free-cad/viewtopic.php?f=19&t=4205
 
 Each Part should be correctly named, and placed into subdirectories by family or type. They should also
-be available in both .FcStd and .stp formats. They should also be as simple as possible, and parametric
+be available in both .FcStd and .stp formats, and optionally in .stp format (because github lets you
+visualize them). They should also be as simple as possible, and parametric
 so users can easily change their dimensions.