diff --git a/bin/unicorn b/bin/unicorn
index 38e238c1f3..a0bafc1981 100755
--- a/bin/unicorn
+++ b/bin/unicorn
@@ -30,6 +30,7 @@ def ensure_cache_clean!
     puts
   end
 
+  FileUtils.mkdir_p(RAILS_ROOT + "/tmp")
   File.write(hash_file, supersha_hash)
 end