diff --git a/example/poisson_gmg/parthenon_app_inputs.cpp b/example/poisson_gmg/parthenon_app_inputs.cpp
index 65d361e3144d..8a51c59f7baf 100644
--- a/example/poisson_gmg/parthenon_app_inputs.cpp
+++ b/example/poisson_gmg/parthenon_app_inputs.cpp
@@ -60,9 +60,9 @@ void ProblemGenerator(Mesh *pm, ParameterInput *pin, MeshData<Real> *md) {
         Real x1 = coords.X<1, te>(i);
         Real x2 = coords.X<2, te>(j);
         Real x3 = coords.X<2, te>(k);
-        Real x1f = coords.X<1, TE::F1>(i);
-        Real x2f = coords.X<2, TE::F2>(j);
-        Real x3f = coords.X<2, TE::F3>(k);
+        Real x1f = coords.X<1, TE::F1>(k, j, i);
+        Real x2f = coords.X<2, TE::F2>(k, j, i);
+        Real x3f = coords.X<2, TE::F3>(k, j, i);
         Real dx1 = coords.Dxc<1>(k, j, i);
         Real dx2 = coords.Dxc<2>(k, j, i);
         Real dx3 = coords.Dxc<3>(k, j, i);