diff --git a/lib/geocoder/cache.rb b/lib/geocoder/cache.rb
index f291575ce266842cc930dece6b3e543e7ebb1a14..e15fba6ff58b3bbd360adf27ccef82f8dcf35827 100644
--- a/lib/geocoder/cache.rb
+++ b/lib/geocoder/cache.rb
@@ -28,7 +28,7 @@ module Geocoder
       if url == :all
         urls.each{ |u| expire(u) }
       else
-        self[url] = nil
+        expire_single_url(url)
       end
     end
 
@@ -66,5 +66,9 @@ module Geocoder
     def interpret(value)
       value == "" ? nil : value
     end
+
+    def expire_single_url(url)
+      self[url] = nil
+    end
   end
 end