diff --git a/include/freetype/freetype.h b/include/freetype/freetype.h
index 158d906a2..5e6b6c36f 100644
--- a/include/freetype/freetype.h
+++ b/include/freetype/freetype.h
@@ -913,8 +913,9 @@ FT_BEGIN_HEADER
 
     FT_Generic        generic;
 
-    /*# the following are only relevant to scalable outlines; */
-    /*# cf. `FT_Bitmap_Size' for bitmap fonts                 */
+    /*# The following member variables (down to `underline_thickness') */
+    /*# are only relevant to scalable outlines; cf. @FT_Bitmap_Size    */
+    /*# for bitmap fonts.                                              */
     FT_BBox           bbox;
 
     FT_UShort         units_per_EM;