1 files changed, 1 insertions, 1 deletions

diff --git a/src/floatfns.c b/src/floatfns.c
index 79574e0a69b..71f53542283 100644
--- a/src/floatfns.c
+++ b/src/floatfns.c
@@ -508,7 +508,7 @@ DEFUN ("expt", Fexpt, Sexpt, 2, 2, 0,
 
 DEFUN ("log", Flog, Slog, 1, 2, 0,
        doc: /* Return the natural logarithm of ARG.
-If second optional argument BASE is given, return log ARG using that base.  */)
+If the optional argument BASE is given, return log ARG using that base.  */)
      (arg, base)
      register Lisp_Object arg, base;
 {