--- a/breakpoint.c
+++ b/breakpoint.c
@@ -15606,7 +15606,10 @@ save_breakpoints (char *filename, int fr
   make_cleanup_ui_file_delete (fp);
 
   if (extra_trace_bits)
-    save_trace_state_variables (fp);
+    {
+      fprintf_unfiltered (fp, "set default-collect $%s\n", default_collect);
+      save_trace_state_variables (fp);
+    }
 
   ALL_BREAKPOINTS (tp)
   {