1 files changed, 1 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb b/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb
index eb88845913..679878d860 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb
@@ -108,7 +108,7 @@ module ActiveRecord
         when Numeric, ActiveSupport::Duration then value.to_s
         when Date, Time then "'#{quoted_date(value)}'"
         when Symbol     then "'#{quote_string(value.to_s)}'"
-        when Class      then "'#{value.to_s}'"
+        when Class      then "'#{value}'"
         else
           "'#{quote_string(YAML.dump(value))}'"
         end