Index: share/man/man9/style.9
===================================================================
--- share/man/man9/style.9
+++ share/man/man9/style.9
@@ -57,11 +57,17 @@
 
 /* Most single-line comments look like this. */
 
+// Although they may look like this.
+
 /*
  * Multi-line comments look like this.  Make them real sentences.  Fill
  * them so they look like real paragraphs.
  */
 .Ed
+C++ comments should only be used for single line comments, or comments at the
+end of a statement.
+C++ comments should not be introduced into existing code and should be
+consistently used within a file.
 .Pp
 The copyright header should be a multi-line comment, with the first
 line of the comment having a dash after the star like so: