diff --git a/Library/Homebrew/formula.rb b/Library/Homebrew/formula.rb
index 15ce8889c6..7af0989a74 100644
--- a/Library/Homebrew/formula.rb
+++ b/Library/Homebrew/formula.rb
@@ -229,6 +229,7 @@ class Formula
   end
 
   def lock
+    HOMEBREW_CACHE_FORMULA.mkpath
     lockpath = HOMEBREW_CACHE_FORMULA/"#{@name}.brewing"
     @lockfile = lockpath.open(File::RDWR | File::CREAT)
     unless @lockfile.flock(File::LOCK_EX | File::LOCK_NB)
diff --git a/Library/Homebrew/keg.rb b/Library/Homebrew/keg.rb
index 4949d24dc3..674ac881fa 100644
--- a/Library/Homebrew/keg.rb
+++ b/Library/Homebrew/keg.rb
@@ -62,6 +62,7 @@ class Keg < Pathname
   end
 
   def lock
+    HOMEBREW_CACHE_FORMULA.mkpath
     path = HOMEBREW_CACHE_FORMULA/"#{fname}.brewing"
     file = path.open(File::RDWR | File::CREAT)
     unless file.flock(File::LOCK_EX | File::LOCK_NB)