diff --git a/src/pynwb/ogen.py b/src/pynwb/ogen.py
index 01763c2da..af11842e4 100644
--- a/src/pynwb/ogen.py
+++ b/src/pynwb/ogen.py
@@ -39,7 +39,7 @@ class OptogeneticSeries(TimeSeries):
     @docval(*get_docval(TimeSeries.__init__, 'name'),  # required
             {'name': 'data', 'type': ('array_data', 'data', TimeSeries),  # required
              'shape': [(None, ), (None, None)],
-             'doc': 'The data values over time. Must be 1D.'},
+             'doc': 'The data values over time.'},
             {'name': 'site', 'type': OptogeneticStimulusSite,  # required
              'doc': 'The site to which this stimulus was applied.'},
             *get_docval(TimeSeries.__init__, 'resolution', 'conversion', 'timestamps', 'starting_time', 'rate',