diff --git a/src/bounce/dynamics/shapes/hull_shape.cpp b/src/bounce/dynamics/shapes/hull_shape.cpp
index cb43a13..0521a05 100644
--- a/src/bounce/dynamics/shapes/hull_shape.cpp
+++ b/src/bounce/dynamics/shapes/hull_shape.cpp
@@ -374,7 +374,7 @@ bool b3HullShape::TestSphere(b3TestSphereOutput* output, const b3Sphere& sphere,
 
 	if (maxIndex != ~0)
 	{
-		output->separation = maxSeparation;
+		output->separation = maxSeparation - radius;
 		output->normal = b3Mul(xf.rotation, m_hull->GetPlane(maxIndex).normal);
 		return true;
 	}