diff --git a/Library/Homebrew/tap.rb b/Library/Homebrew/tap.rb
index 66d89ee3ef..92f02fc062 100644
--- a/Library/Homebrew/tap.rb
+++ b/Library/Homebrew/tap.rb
@@ -42,7 +42,7 @@ class Tap
   end
 
   def installed?
-    (@path/".git").directory?
+    @path.directory?
   end
 
   def custom_remote?