diff --git a/postmodern/package.lisp b/postmodern/package.lisp
index 7f6694e..c6e5a14 100644
--- a/postmodern/package.lisp
+++ b/postmodern/package.lisp
@@ -100,6 +100,7 @@
    #:sql-error
    #:from-sql-name
    #:to-sql-name
+   #:db-null
 
    ;; Condition type from cl-postgres
    #:database-error