(Fdefvaralias): Doc fix.

1 files changed, 3 insertions, 1 deletions

diff --git a/src/eval.c b/src/eval.c
index 6832f3197ad..8b6c1885727 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -725,7 +725,9 @@ DEFUN ("defvaralias", Fdefvaralias, Sdefvaralias, 2, 3, 0,
        doc: /* Make SYMBOL a variable alias for symbol ALIASED.
 Setting the value of SYMBOL will subsequently set the value of ALIASED,
 and getting the value of SYMBOL will return the value ALIASED has.
-Third arg DOCSTRING, if non-nil, is documentation for SYMBOL.
+Third arg DOCSTRING, if non-nil, is documentation for SYMBOL.  If it is
+omitted or nil, SYMBOL gets the documentation string of ALIASED, or of the
+variable at the end of the chain of aliases, if ALIASED is itself an alias.
 The return value is ALIASED.  */)
      (symbol, aliased, docstring)
      Lisp_Object symbol, aliased, docstring;