diff --git a/lib/net/ldap/filter.rb b/lib/net/ldap/filter.rb
index 660684f..96e7cb1 100644
--- a/lib/net/ldap/filter.rb
+++ b/lib/net/ldap/filter.rb
@@ -733,7 +733,7 @@ class Net::LDAP::Filter
         scanner.scan(/\s*/)
         if op = scanner.scan(/<=|>=|!=|:=|=/)
           scanner.scan(/\s*/)
-          if value = scanner.scan(/(?:[-\w*.+@=,#\$%&!'\s]|\\[a-fA-F\d]{2})+/)
+          if value = scanner.scan(/(?:[-\w*.+@=,#\$%&!'\s\xC3\x80-\xCA\xAF]|\\[a-fA-F\d]{2})+/)
             # 20100313 AZ: Assumes that "(uid=george*)" is the same as
             # "(uid=george* )". The standard doesn't specify, but I can find
             # no examples that suggest otherwise.