diff --git a/mrbgems/mruby-bin-mirb/tools/mirb/mirb.c b/mrbgems/mruby-bin-mirb/tools/mirb/mirb.c
index 50556e092..ecb65eecc 100644
--- a/mrbgems/mruby-bin-mirb/tools/mirb/mirb.c
+++ b/mrbgems/mruby-bin-mirb/tools/mirb/mirb.c
@@ -275,6 +275,7 @@ main(int argc, char **argv)
 
   cxt = mrbc_context_new(mrb);
   cxt->capture_errors = 1;
+  mrbc_filename(mrb, cxt, "(mirb)");
   if (args.verbose) cxt->dump_result = 1;
 
   ai = mrb_gc_arena_save(mrb);