diff --git a/Library/Homebrew/formula.rb b/Library/Homebrew/formula.rb
index 420203167b72085e6bde2763e52e87844ce8507d..494024278fc159a804e4faa8f7e325c4ad3bca9f 100644
--- a/Library/Homebrew/formula.rb
+++ b/Library/Homebrew/formula.rb
@@ -143,7 +143,7 @@ class Formula
   end
 
   def prefix
-    HOMEBREW_CELLAR/name/version
+    HOMEBREW_CELLAR+name+version
   end
   def rack; prefix.parent end
 
diff --git a/Library/Homebrew/formula_pin.rb b/Library/Homebrew/formula_pin.rb
index eaf1888f9f7c57798fcd02e66544b26a89574e4c..c809a02b8aab2d86dc5b8ac275f4b0771689630e 100644
--- a/Library/Homebrew/formula_pin.rb
+++ b/Library/Homebrew/formula_pin.rb
@@ -1,13 +1,13 @@
 require 'fileutils'
 
 class FormulaPin
-  HOMEBREW_PINNED = HOMEBREW_LIBRARY/'PinnedKegs'
+  HOMEBREW_PINNED = HOMEBREW_LIBRARY+'PinnedKegs'
 
   def initialize(formula)
     @formula = formula
     @name = formula.name
     HOMEBREW_PINNED.mkdir unless HOMEBREW_PINNED.exist?
-    @path = HOMEBREW_PINNED/@name
+    @path = HOMEBREW_PINNED+@name
   end
 
   def pin_at(version)