diff --git a/app/controllers/wiki_controller.rb b/app/controllers/wiki_controller.rb
index 172ba264..1d881da4 100644
--- a/app/controllers/wiki_controller.rb
+++ b/app/controllers/wiki_controller.rb
@@ -382,7 +382,7 @@ class WikiController < ApplicationController
   def remote_ip
     ip = request.remote_ip
     logger.info(ip)
-    ip.gsub!(Regexp.union(Resolv::IPv4::Regex, Resolv::IPv6::Regex), '\0') || 'bogus address'
+    ip.dup.gsub!(Regexp.union(Resolv::IPv4::Regex, Resolv::IPv6::Regex), '\0') || 'bogus address'
   end
 
   def render_rss(hide_description = false, limit = 15, start_date = nil, end_date = nil)