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path: root/Source/FieldSolver/FiniteDifferenceSolver/EvolveE.cpp
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-rw-r--r--Source/FieldSolver/FiniteDifferenceSolver/EvolveE.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/Source/FieldSolver/FiniteDifferenceSolver/EvolveE.cpp b/Source/FieldSolver/FiniteDifferenceSolver/EvolveE.cpp
index 3ea6bc8db..b04498638 100644
--- a/Source/FieldSolver/FiniteDifferenceSolver/EvolveE.cpp
+++ b/Source/FieldSolver/FiniteDifferenceSolver/EvolveE.cpp
@@ -199,7 +199,7 @@ void FiniteDifferenceSolver::EvolveECartesian (
if (Ffield) {
// Extract field data for this grid/tile
- Array4<Real> F = Ffield->array(mfi);
+ const Array4<Real> F = Ffield->array(mfi);
// Loop over the cells and update the fields
amrex::ParallelFor(tex, tey, tez,