diff --git a/src/meshTools/searchableSurface/triSurfaceMesh.C b/src/meshTools/searchableSurface/triSurfaceMesh.C
index c532ac3d39..aa117c2794 100644
--- a/src/meshTools/searchableSurface/triSurfaceMesh.C
+++ b/src/meshTools/searchableSurface/triSurfaceMesh.C
@@ -738,7 +738,6 @@ void Foam::triSurfaceMesh::findLineAll
     //   we need something bigger since we're doing calculations)
     // - if the start-end vector is zero we still progress
     const vectorField dirVec(end-start);
-    const scalarField magSqrDirVec(magSqr(dirVec));
     const vectorField smallVec
     (
         indexedOctree<treeDataTriSurface>::perturbTol()*dirVec