diff --git a/src/gpu/core/PreCollisionInteractor/Actuator/ActuatorFarmInlines.h b/src/gpu/core/PreCollisionInteractor/Actuator/ActuatorFarmInlines.h
index 69ed5d8c2b7ac60001f97f237e6ec5d62faaf2cd..918b02f9b29cb346970451f68470c802041515e3 100644
--- a/src/gpu/core/PreCollisionInteractor/Actuator/ActuatorFarmInlines.h
+++ b/src/gpu/core/PreCollisionInteractor/Actuator/ActuatorFarmInlines.h
@@ -98,7 +98,7 @@ __host__ __device__ __inline__ real distSqrd(real distX, real distY, real distZ)
 
 __host__ __device__ __inline__ real getBoundingSphereRadius(real diameter, real smearingWidth)
 {
-    return c1o2 * diameter + c4o1 * smearingWidth;
+    return c1o2 * diameter + c3o2 * smearingWidth;
 }
 
 __host__ __device__ __inline__ bool inBoundingSphere(real distX, real distY, real distZ, real diameter, real smearingWidth)