diff --git a/src/ctapipe/calib/camera/outlier.py b/src/ctapipe/calib/camera/outlier.py
index 6d8ef229e51..559bde5d650 100644
--- a/src/ctapipe/calib/camera/outlier.py
+++ b/src/ctapipe/calib/camera/outlier.py
@@ -44,12 +44,12 @@ def __call__(self, column) -> bool:
         ----------
         column : astropy.table.Column
             column with chunk-wise extracted statistics (mean, median, or std)
-            of shape (n_channels, n_pix)
+            of shape (n_entries, n_channels, n_pix)
 
         Returns
         -------
         boolean mask
-            mask of outliers of shape (n_channels, n_pix)
+            mask of outliers of shape (n_entries, n_channels, n_pix)
         """
         pass