diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 76585e84cf..4218f966e4 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,7 @@
+2017-09-27  Tom Tromey  <tom@tromey.com>
+
+	* top.c (new_ui_command): Constify.
+
 2017-09-27  Tom Tromey  <tom@tromey.com>
 
 	* symfile.c (add_symbol_file_command)
diff --git a/gdb/top.c b/gdb/top.c
index c89e78f243..4fc987c432 100644
--- a/gdb/top.c
+++ b/gdb/top.c
@@ -354,7 +354,7 @@ open_terminal_stream (const char *name)
 /* Implementation of the "new-ui" command.  */
 
 static void
-new_ui_command (char *args, int from_tty)
+new_ui_command (const char *args, int from_tty)
 {
   struct ui *ui;
   struct interp *interp;