diff --git a/shared-data/python/opentrons_shared_data/labware/types.py b/shared-data/python/opentrons_shared_data/labware/types.py
index c92c9d04dec..8a6135de8f9 100644
--- a/shared-data/python/opentrons_shared_data/labware/types.py
+++ b/shared-data/python/opentrons_shared_data/labware/types.py
@@ -136,7 +136,7 @@ class SphericalSegment(TypedDict):
 
 
 TopCrossSection = Union[CircularCrossSection, RectangularCrossSection]
-BottomShape = Union[CircularCrossSection, RectangularCrossSection, Spherical]
+BottomShape = Union[CircularCrossSection, RectangularCrossSection, SphericalSegment]
 
 
 class BoundedSection(TypedDict):