diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 6a3476946a8..9afbb776309 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,9 @@
+2017-09-27  Tom Tromey  <tom@tromey.com>
+
+	* symtab.c (maintenance_print_symbol_cache)
+	(maintenance_flush_symbol_cache)
+	(maintenance_print_symbol_cache_statistics): Constify.
+
 2017-09-27  Tom Tromey  <tom@tromey.com>
 
 	* inferior.c (detach_inferior_command, kill_inferior_command)
diff --git a/gdb/symtab.c b/gdb/symtab.c
index bf7ee646d42..2da37e86993 100644
--- a/gdb/symtab.c
+++ b/gdb/symtab.c
@@ -1500,7 +1500,7 @@ symbol_cache_dump (const struct symbol_cache *cache)
 /* The "mt print symbol-cache" command.  */
 
 static void
-maintenance_print_symbol_cache (char *args, int from_tty)
+maintenance_print_symbol_cache (const char *args, int from_tty)
 {
   struct program_space *pspace;
 
@@ -1527,7 +1527,7 @@ maintenance_print_symbol_cache (char *args, int from_tty)
 /* The "mt flush-symbol-cache" command.  */
 
 static void
-maintenance_flush_symbol_cache (char *args, int from_tty)
+maintenance_flush_symbol_cache (const char *args, int from_tty)
 {
   struct program_space *pspace;
 
@@ -1572,7 +1572,7 @@ symbol_cache_stats (struct symbol_cache *cache)
 /* The "mt print symbol-cache-statistics" command.  */
 
 static void
-maintenance_print_symbol_cache_statistics (char *args, int from_tty)
+maintenance_print_symbol_cache_statistics (const char *args, int from_tty)
 {
   struct program_space *pspace;