diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb b/activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb
index 496f33376ae6ebbdce3413aca6e9daef8ccdd017..c1f978a081c8405a6bca9689880f9de16e9da2d4 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb
@@ -126,7 +126,7 @@ def type_cast(value, column, array_member = false)
             else super(value, column)
             end
           when IPAddr
-            if ['inet','cidr'].include? column.sql_type
+            if %w(inet cidr).include? column.sql_type
               PostgreSQLColumn.cidr_to_string(value)
             else
               super(value, column)