diff --git a/sys/sys/protosw.h b/sys/sys/protosw.h
index e227ea38d6c..132b199c1f5 100644
--- a/sys/sys/protosw.h
+++ b/sys/sys/protosw.h
@@ -242,7 +242,7 @@ struct pr_usrreqs {
 };
 
 /*
- * below.  All functions return EOPNOTSUPP.
+ * All nonvoid pru_*() functions below return EOPNOTSUPP.
  */
 
 int	pru_abort_notsupp(struct socket *so);