diff --git a/lib/things/document.rb b/lib/things/document.rb
index <HASH>..<HASH> 100644
--- a/lib/things/document.rb
+++ b/lib/things/document.rb
@@ -1,6 +1,6 @@
 module Things
   class Document
-    DEFAULT_DATABASE_PATH = ENV['HOME'] + '/Library/Application Support/Cultured Code/Things/Database.xml' unless defined?(DEFAULT_DATABASE_PATH)
+    DEFAULT_DATABASE_PATH = "#{ENV['HOME']}/Library/Application Support/Cultured Code/Things/Database.xml" unless defined?(DEFAULT_DATABASE_PATH)
     
     attr_reader :database_file
   
@@ -36,4 +36,4 @@ module Things
       @doc = Hpricot(IO.read(database_file))
     end
   end
-end
\ No newline at end of file
+end
Use interpolation for DEFAULT_DATABASE_PATH