diff --git a/benchmark/gc/pentomino.rb b/benchmark/gc/pentomino.rb
index 9d90bcb48f..94ba74be89 100644
--- a/benchmark/gc/pentomino.rb
+++ b/benchmark/gc/pentomino.rb
@@ -1 +1 @@
-require_relative '../bm_app_pentomino.rb'
+require_relative '../bm_app_pentomino.rb'