1 files changed, 2 insertions, 2 deletions

diff --git a/src/fns.c b/src/fns.c
index cb3ed14a3a8..2e0c2b90a8e 100644
--- a/src/fns.c
+++ b/src/fns.c
@@ -4982,8 +4982,8 @@ into a file.\n\
 If OBJECT is a string, the most preferred coding system (see the\n\
 command `prefer-coding-system') is used.\n\
 \n\
-The optional fifth argument NOERROR exists for compatibility with\n\
-other Emacs versions, and is ignored.")
+If NOERROR is non-nil, silently assume the `raw_text' coding if the\n\
+guesswork fails.  Normally, an error is signaled in such case.")
   (object, start, end, coding_system, noerror)
      Lisp_Object object, start, end, coding_system, noerror;
 {