diff --git a/src/fvMotionSolver/pointPatchFields/derived/surfaceDisplacement/surfaceDisplacementPointPatchVectorField.C b/src/fvMotionSolver/pointPatchFields/derived/surfaceDisplacement/surfaceDisplacementPointPatchVectorField.C
index 8a3cd26b68..147418aa2d 100644
--- a/src/fvMotionSolver/pointPatchFields/derived/surfaceDisplacement/surfaceDisplacementPointPatchVectorField.C
+++ b/src/fvMotionSolver/pointPatchFields/derived/surfaceDisplacement/surfaceDisplacementPointPatchVectorField.C
@@ -72,7 +72,7 @@ void surfaceDisplacementPointPatchVectorField::calcProjection
     const scalar projectLen = mag(mesh.bounds().max()-mesh.bounds().min());
 
     // For case of fixed projection vector:
-    vector projectVec;
+    vector projectVec(vector::zero);
     if (projectMode_ == FIXEDNORMAL)
     {
         vector n = projectDir_/mag(projectDir_);