diff --git a/pylinac/core/roi.py b/pylinac/core/roi.py
index 6e611e4a..5a269c05 100644
--- a/pylinac/core/roi.py
+++ b/pylinac/core/roi.py
@@ -458,8 +458,6 @@ def __init__(
             The ROI center location.
         contrast_threshold : float, int
             The threshold for considering a bubble to be "seen".
-        contrast_threshold : float, int
-            The threshold for considering a bubble to be "seen".
         """
         super().__init__(array=array, radius=radius, center=center)
         self.contrast_threshold = contrast_threshold