diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 74e805db123..00de27b2669 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2017-09-27  Tom Tromey  <tom@tromey.com>
+
+	* linux-fork.c (delete_checkpoint_command)
+	(detach_checkpoint_command): Constify.
+
 2017-09-27  Tom Tromey  <tom@tromey.com>
 
 	* cp-abi.c (set_cp_abi_cmd, show_cp_abi_cmd): Constify.
diff --git a/gdb/linux-fork.c b/gdb/linux-fork.c
index 6b9c6a87601..554cfae7720 100644
--- a/gdb/linux-fork.c
+++ b/gdb/linux-fork.c
@@ -503,7 +503,7 @@ out:
 /* Fork list <-> user interface.  */
 
 static void
-delete_checkpoint_command (char *args, int from_tty)
+delete_checkpoint_command (const char *args, int from_tty)
 {
   ptid_t ptid, pptid;
   struct fork_info *fi;
@@ -544,7 +544,7 @@ Please switch to another checkpoint before deleting the current one"));
 }
 
 static void
-detach_checkpoint_command (char *args, int from_tty)
+detach_checkpoint_command (const char *args, int from_tty)
 {
   ptid_t ptid;