diff --git a/core/filters/browser.rb b/core/filters/browser.rb
index ca656e86b..73d5cd131 100644
--- a/core/filters/browser.rb
+++ b/core/filters/browser.rb
@@ -123,9 +123,9 @@ module Filters
     return true if not is_non_empty_string?(str)
     return false if str.length > 1000
     if RUBY_VERSION >= "1.9" && str.encoding === Encoding.find('UTF-8')
-      return (str =~ /[^\w\d\s()-.,;_!\302\256]/u).nil?
+      return (str =~ /[^\w\d\s()-.,';_!\302\256]/u).nil?
     else
-      return (str =~ /[^\w\d\s()-.,;_!\302\256]/n).nil?
+      return (str =~ /[^\w\d\s()-.,';_!\302\256]/n).nil?
     end
   end