diff --git a/Library/Homebrew/build.rb b/Library/Homebrew/build.rb
index 99e8a35505..dc94cf738c 100755
--- a/Library/Homebrew/build.rb
+++ b/Library/Homebrew/build.rb
@@ -149,5 +149,5 @@ def fixopt f
   end
   Keg.new(path).optlink
 rescue StandardError
-  "#{opt} not present or broken\nPlease reinstall #{dep}. Sorry :("
+  "#{f.opt_prefix} not present or broken\nPlease reinstall #{f}. Sorry :("
 end