diff --git a/Library/Homebrew/formula_support.rb b/Library/Homebrew/formula_support.rb
index 9f30afbf7b..caf82f7651 100644
--- a/Library/Homebrew/formula_support.rb
+++ b/Library/Homebrew/formula_support.rb
@@ -172,6 +172,11 @@ class Option
     @flag = '--'+name.to_s
   end
 
+  def to_s
+    flag
+  end
+  alias_method :to_str, :to_s
+
   def eql?(other)
     @name == other.name
   end