diff --git a/src/ChangeLog b/src/ChangeLog
index 4a16ff32b11..15e32fab73e 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,7 @@
+2008-08-30  Glenn Morris  <rgm@gnu.org>
+
+	* frame.c (Fmodify_frame_parameters): Doc fix.
+
 2008-08-30  Eli Zaretskii  <eliz@gnu.org>
 
 	* w32.c (stat): Only root directory passed to GetDriveType.  Allow
diff --git a/src/frame.c b/src/frame.c
index 958d6031207..b1f3915dd44 100644
--- a/src/frame.c
+++ b/src/frame.c
@@ -2265,7 +2265,9 @@ so that `frame-parameters' will return them.
 
 The value of frame parameter FOO can also be accessed
 as a frame-local binding for the variable FOO, if you have
-enabled such bindings for that variable with `make-variable-frame-local'.  */)
+enabled such bindings for that variable with `make-variable-frame-local'.
+Note that this functionality is obsolete as of Emacs 22.2, and its
+use is not recommended.  Explicitly check for a frame-parameter instead.  */)
      (frame, alist)
      Lisp_Object frame, alist;
 {