diff --git a/gdb/stack.c b/gdb/stack.c
index 889efe62e0d..6fcc26417e2 100644
--- a/gdb/stack.c
+++ b/gdb/stack.c
@@ -2484,8 +2484,6 @@ print_frame_arg_vars (const frame_info_ptr &frame,
   struct print_variable_and_value_data cb_data;
   struct symbol *func;
   std::optional<CORE_ADDR> pc;
-  std::optional<compiled_regex> preg;
-  std::optional<compiled_regex> treg;
 
   if (!(pc = get_frame_pc_if_available (frame)))
     {