diff --git a/lib/geocoder/configuration.rb b/lib/geocoder/configuration.rb
index 44baabeebf4547d063ee0798ce643a2d1aebfa86..a534a39eb89089d6cf4f21678f67777937ae2742 100644
--- a/lib/geocoder/configuration.rb
+++ b/lib/geocoder/configuration.rb
@@ -14,6 +14,9 @@ module Geocoder
 
         # use HTTPS for lookup requests? (if supported)
         [:use_https, false],
+        
+        # optionally supply the headers for the HTTP request, e.g. User-Agent
+        [:request_headers, {}],
 
         # HTTP proxy server (user:pass@host:port)
         [:http_proxy, nil],