diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 9a77b0ddbc..a32596e9fd 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2017-09-27  Tom Tromey  <tom@tromey.com>
+
+	* progspace.c (maintenance_info_program_spaces_command):
+	Constify.
+
 2017-09-27  Tom Tromey  <tom@tromey.com>
 
 	* compile/compile.c (check_raw_argument, compile_file_command)
diff --git a/gdb/progspace.c b/gdb/progspace.c
index 0f3ac81bd0..41e8cd0e71 100644
--- a/gdb/progspace.c
+++ b/gdb/progspace.c
@@ -345,7 +345,7 @@ valid_program_space_id (int num)
    indicating which the program space to print information about.  */
 
 static void
-maintenance_info_program_spaces_command (char *args, int from_tty)
+maintenance_info_program_spaces_command (const char *args, int from_tty)
 {
   int requested = -1;