diff --git a/lib/netsuite/support/country.rb b/lib/netsuite/support/country.rb
index ab576353c..bdf652be1 100644
--- a/lib/netsuite/support/country.rb
+++ b/lib/netsuite/support/country.rb
@@ -259,7 +259,7 @@ class Country
       }
 
       def initialize(iso_or_name = '')
-        if iso_or_name =~ /^[A-Z]{2}/
+        if iso_or_name.to_s.upcase =~ /^[A-Z]{2}/
           @id = iso_to_netsuite.fetch(iso_or_name)
         else
           @id = iso_or_name