diff --git a/src/pynwb/base.py b/src/pynwb/base.py
index 5bb9c4259..98fb62372 100644
--- a/src/pynwb/base.py
+++ b/src/pynwb/base.py
@@ -353,7 +353,7 @@ def get_data_in_units(self):
 
         Returns
         -------
-        np.array
+        :class:`numpy.ndarray`
 
         """
         if "channel_conversion" in self.fields: