diff --git a/docs/ref/contrib/postgres/fields.txt b/docs/ref/contrib/postgres/fields.txt
index 80b63b9..5073142 100644
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All of the range fields translate to :ref:`psycopg2 Range objects
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588 | 588 | information is necessary. The default is lower bound included, upper bound |
589 | 589 | excluded. |
590 | 590 | |
| 591 | .. note:: |
| 592 | |
| 593 | The PostgreSQL ``DateRangeField`` will always return a canonicalized |
| 594 | form that includes the lower bound and excludes the upper bound; that is, ``[)``. |
| 595 | |
| 596 | |
591 | 597 | ``IntegerRangeField`` |
592 | 598 | --------------------- |
593 | 599 | |