diff --git a/benchmark/driver.rb b/benchmark/driver.rb
old mode 100644
new mode 100755
index 20c8e255fb..469fc99f40
--- a/benchmark/driver.rb
+++ b/benchmark/driver.rb
@@ -1,3 +1,4 @@
+#!/usr/bin/env ruby
 #
 # Ruby Benchmark driver
 #