diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 4dbe3ed79c3..f58329790b2 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,7 @@
+2017-09-27  Tom Tromey  <tom@tromey.com>
+
+	* user-regs.c (maintenance_print_user_registers): Constify.
+
 2017-09-27  Tom Tromey  <tom@tromey.com>
 
 	* cp-namespace.c (maintenance_cplus_namespace): Constify.
diff --git a/gdb/user-regs.c b/gdb/user-regs.c
index 121c69ffd73..a5388d1ceb4 100644
--- a/gdb/user-regs.c
+++ b/gdb/user-regs.c
@@ -222,7 +222,7 @@ value_of_user_reg (int regnum, struct frame_info *frame)
 }
 
 static void
-maintenance_print_user_registers (char *args, int from_tty)
+maintenance_print_user_registers (const char *args, int from_tty)
 {
   struct gdbarch *gdbarch = get_current_arch ();
   struct gdb_user_regs *regs;