diff --git a/Library/Homebrew/utils.rb b/Library/Homebrew/utils.rb
index ac960f257e..e91700c5eb 100644
--- a/Library/Homebrew/utils.rb
+++ b/Library/Homebrew/utils.rb
@@ -400,7 +400,7 @@ module MacOS extend self
   end
 
   def bottles_supported?
-    lion? and HOMEBREW_CELLAR.to_s == '/usr/local/Cellar'
+    lion? and HOMEBREW_PREFIX.to_s == '/usr/local' and HOMEBREW_CELLAR.to_s == '/usr/local/Cellar'
   end
 end