diff --git a/src/sources/mssql/mssql-schema.lisp b/src/sources/mssql/mssql-schema.lisp
index fdebb34..d7bf721 100644
--- a/src/sources/mssql/mssql-schema.lisp
+++ b/src/sources/mssql/mssql-schema.lisp
@@ -298,6 +298,7 @@ ORDER BY CONSTRAINT_NAME, KCU1.ORDINAL_POSITION
    Mostly we just use the name, and make try to avoid parsing dates."
   (case (intern (string-upcase type) "KEYWORD")
     (:datetime  (format nil "convert(varchar, [~a], 126)" name))
+    (:bigint    (format nil "cast([~a] as numeric)" name))
     (t          (format nil "[~a]" name))))
 
 (defun get-column-list (columns)