diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 6704ccdd2e..b31d87b035 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,7 @@
+2017-09-27  Tom Tromey  <tom@tromey.com>
+
+	* value.c (show_convenience): Constify.
+
 2017-09-27  Tom Tromey  <tom@tromey.com>
 
 	* gdbcore.h (core_file_command): Update.
diff --git a/gdb/value.c b/gdb/value.c
index 1fd9cc9a7d..d0871ef5bb 100644
--- a/gdb/value.c
+++ b/gdb/value.c
@@ -885,8 +885,6 @@ value_contents_eq (const struct value *val1, LONGEST offset1,
 
 static void show_values (char *, int);
 
-static void show_convenience (char *, int);
-
 
 /* The value-history records all the values printed
    by print commands during this session.  Each chunk
@@ -2661,7 +2659,7 @@ preserve_values (struct objfile *objfile)
 }
 
 static void
-show_convenience (char *ignore, int from_tty)
+show_convenience (const char *ignore, int from_tty)
 {
   struct gdbarch *gdbarch = get_current_arch ();
   struct internalvar *var;