diff --git a/src/pgsql/pgsql-finalize-catalogs.lisp b/src/pgsql/pgsql-finalize-catalogs.lisp
index 5684100..65d53d6 100644
--- a/src/pgsql/pgsql-finalize-catalogs.lisp
+++ b/src/pgsql/pgsql-finalize-catalogs.lisp
@@ -42,6 +42,12 @@
 (defmethod adjust-data-types ((catalog catalog) (variant (eql :pgdg)))
   catalog)
 
+;;;
+;;; Accept that sometimes the variant hasn't been specified at all.
+;;;
+(defmethod adjust-data-types ((catalog catalog) (variant (eql nil)))
+  catalog)
+
 ;;;
 ;;; The RedShift case is a little more involved, as shown in their
 ;;; documentation: