diff --git a/src/roiextractors/volumetricimagingextractor.py b/src/roiextractors/volumetricimagingextractor.py
index 394e11a5..759caf8f 100644
--- a/src/roiextractors/volumetricimagingextractor.py
+++ b/src/roiextractors/volumetricimagingextractor.py
@@ -78,7 +78,7 @@ def get_video(self, start_frame: Optional[int] = None, end_frame: Optional[int]
         Returns
         -------
         video: numpy.ndarray
-            The 3D video frames (num_rows, num_columns, num_planes).
+            The 3D video frames (num_frames, num_rows, num_columns, num_planes).
         """
         if start_frame is None:
             start_frame = 0