1 files changed, 3 insertions, 3 deletions

diff --git a/src/minibuf.c b/src/minibuf.c
index fc876370a2d..6a2d52ae6b7 100644
--- a/src/minibuf.c
+++ b/src/minibuf.c
@@ -1561,9 +1561,9 @@ predicate is called with two arguments: the key and the value.
 Additionally to this predicate, `completion-regexp-list'
 is used to further constrain the set of candidates.
 
-If the optional fourth argument HIDE-SPACES is non-nil,
-strings in COLLECTION that start with a space
-are ignored unless STRING itself starts with a space.  */)
+An osbolete optional fourth argument HIDE-SPACES is still accepted for
+backward compatiblity.  If non-nil, strings in COLLECTION that start
+with a space are ignored unless STRING itself starts with a space.  */)
      (string, collection, predicate, hide_spaces)
      Lisp_Object string, collection, predicate, hide_spaces;
 {