diff --git a/test/rb/TestClient.rb b/test/rb/TestClient.rb
index beb5af1..a4aecb8 100755
--- a/test/rb/TestClient.rb
+++ b/test/rb/TestClient.rb
@@ -1,4 +1,4 @@
-#!/usr/bin/ruby
+#!/usr/bin/env ruby
 
 $:.push('gen-rb')
 $:.push('../../lib/rb/lib')