diff --git a/bedstead.c b/bedstead.c
index 47cff2c..15cb39b 100644
--- a/bedstead.c
+++ b/bedstead.c
@@ -506,7 +506,9 @@ static struct glyph {
 
  /*
   * The other batch of glyphs were specially designed for this font.
-  * These are kept sorted by Unicode code point.
+  * These are kept sorted by Unicode code point.  Glyphs accessed
+  * using OpenType features are next to their originals, even when
+  * they also have Private Use Area mappings.
   */
 
  /* Basic Latin */