diff --git a/gcc/fortran/ChangeLog b/gcc/fortran/ChangeLog
index e01ae683f4f..cc97cac2466 100644
--- a/gcc/fortran/ChangeLog
+++ b/gcc/fortran/ChangeLog
@@ -1,3 +1,9 @@
+2012-09-16  Janus Weil  <janus@gcc.gnu.org>
+
+	PR fortran/54594
+	* resolve.c (get_checked_tb_operator_target): Add a reference to the
+	relevant quote from the F08 standard.
+
 2012-09-16  Janus Weil  <janus@gcc.gnu.org>
 
 	PR fortran/54594
diff --git a/gcc/fortran/resolve.c b/gcc/fortran/resolve.c
index 0748b6af78b..6a7b6c9d894 100644
--- a/gcc/fortran/resolve.c
+++ b/gcc/fortran/resolve.c
@@ -11429,7 +11429,7 @@ get_checked_tb_operator_target (gfc_tbp_generic* target, locus where)
   target_proc = target->specific->u.specific->n.sym;
   gcc_assert (target_proc);
 
-  /* All operator bindings must have a passed-object dummy argument.  */
+  /* F08:C468. All operator bindings must have a passed-object dummy argument.  */
   if (target->specific->nopass)
     {
       gfc_error ("Type-bound operator at %L can't be NOPASS", &where);