diff --git a/src/sand-wedge.cc b/src/sand-wedge.cc
index ee8807ee7741cb02a1091ead2a652dafdf647cac..9972840c8910b91072844092658517e37aa24dea 100644
--- a/src/sand-wedge.cc
+++ b/src/sand-wedge.cc
@@ -441,12 +441,12 @@ int main(int argc, char *argv[]) {
       velocityUpdater->nextTimeStep();
 
       auto const relativeTime = double(timeStep) / double(timeSteps);
-      Vector ell(leafVertexCount);
+      Vector ell;
       computeExternalForces(relativeTime, ell);
 
       Matrix velocityMatrix;
-      Vector velocityRHS(leafVertexCount);
-      Vector velocityIterate(leafVertexCount);
+      Vector velocityRHS;
+      Vector velocityIterate;
 
       stateUpdater->setup(tau);
       velocityUpdater->setup(ell, tau, relativeTime, velocityRHS,