diff --git a/CudaSurf.cu b/CudaSurf.cu
index deaa7c5..d29e117 100644
--- a/CudaSurf.cu
+++ b/CudaSurf.cu
@@ -564,9 +564,9 @@ std::vector<MeshData> computeSlicedSES(float3 positions[], float radii[], unsign
 
     // Grid is a cube
     float3 originGridNeighbor = {
-        minVal.x - maxAtomRad - 2 * probeRadius,
-        minVal.y - maxAtomRad - 2 * probeRadius,
-        minVal.z - maxAtomRad - 2 * probeRadius};
+        minVal.x - maxAtomRad - probeRadius,
+        minVal.y - maxAtomRad - probeRadius,
+        minVal.z - maxAtomRad - probeRadius};
 
     int gridNeighborSize = (int)ceil(maxDist / gridResolutionNeighbor);