1 files changed, 3 insertions, 0 deletions

diff --git a/manual/manual.of b/manual/manual.of
index c1a9c138..7cd0d4db 100644
--- a/manual/manual.of
+++ b/manual/manual.of
@@ -8699,6 +8699,9 @@ Writes the value of each of its arguments to @id{file}.
 The arguments must be strings or numbers.
 
 In case of success, this function returns @id{file}.
+Otherwise, it returns four values:
+@fail, the error message, the error code,
+and the number of bytes it was able to write.
 
 }