diff --git a/src/sampling/sampledSurface/sampledCuttingPlane/sampledCuttingPlane.C b/src/sampling/sampledSurface/sampledCuttingPlane/sampledCuttingPlane.C
index 4158c36219..11f98286dc 100644
--- a/src/sampling/sampledSurface/sampledCuttingPlane/sampledCuttingPlane.C
+++ b/src/sampling/sampledSurface/sampledCuttingPlane/sampledCuttingPlane.C
@@ -50,7 +50,7 @@ void Foam::sampledSurfaces::cuttingPlane::createGeometry()
 
     // Clear any stored topologies
     facesPtr_.clear();
-    isoSurfPtr_.ptr();
+    isoSurfPtr_.clear();
     pointDistance_.clear();
     cellDistancePtr_.clear();