diff --git a/src/ChangeLog b/src/ChangeLog
index a5b34e38966ddd1844a6de23f50f40291434b458..284bca338288fd79de951b3ec88c4e7918b6fa66 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,8 @@
+2007-12-22  Eli Zaretskii  <eliz@gnu.org>
+
+	* callint.c (syms_of_callint) <command-history>: Add reference to
+	history-length in the doc string.
+
 2007-12-17  Jason Rumney  <jasonr@gnu.org>
 
 	* w32fns.c (w32_wnd_proc) <WM_KEYDOWN>: Cast char to unsigned
diff --git a/src/callint.c b/src/callint.c
index 9dcc077fd658e61c288d4531d391de1f5a2a1187..65ef8aacadb8e0162e06ce245ca67038e27c5d68 100644
--- a/src/callint.c
+++ b/src/callint.c
@@ -960,7 +960,10 @@ This is what `(interactive \"P\")' returns.  */);
 
   DEFVAR_LISP ("command-history", &Vcommand_history,
 	       doc: /* List of recent commands that read arguments from terminal.
-Each command is represented as a form to evaluate.  */);
+Each command is represented as a form to evaluate.
+
+Maximum length of the history list is determined by the value
+of `history-length', which see.  */);
   Vcommand_history = Qnil;
 
   DEFVAR_LISP ("command-debug-status", &Vcommand_debug_status,