diff --git a/bin/qasim-gui.rb b/bin/qasim-gui.rb
index 73a7d5a..8a7b2b8 100755
--- a/bin/qasim-gui.rb
+++ b/bin/qasim-gui.rb
@@ -1,4 +1,4 @@
-#!/usr/bin/ruby
+#!/usr/bin/env ruby
 
 require 'Qt4'