diff --git a/Core/src/Geometry/CutoutCylinderVolumeBounds.cpp b/Core/src/Geometry/CutoutCylinderVolumeBounds.cpp
index c7fe9641563..49f17cefc33 100644
--- a/Core/src/Geometry/CutoutCylinderVolumeBounds.cpp
+++ b/Core/src/Geometry/CutoutCylinderVolumeBounds.cpp
@@ -159,7 +159,7 @@ void Acts::CutoutCylinderVolumeBounds::buildSurfaceBounds() {
   m_outerCylinderBounds =
       std::make_shared<CylinderBounds>(get(eMaxR), get(eHalfLengthZ));
 
-  m_innerDiscBounds = std::make_shared<RadialBounds>(get(eMinR), get(eMaxR));
+  m_innerDiscBounds = std::make_shared<RadialBounds>(get(eMinR), get(eMedR));
 
-  m_outerDiscBounds = std::make_shared<RadialBounds>(get(eMedR), get(eMaxR));
+  m_outerDiscBounds = std::make_shared<RadialBounds>(get(eMinR), get(eMaxR));
 }