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-rw-r--r--Source/FieldSolver/FiniteDifferenceSolver/MacroscopicEvolveE.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/Source/FieldSolver/FiniteDifferenceSolver/MacroscopicEvolveE.cpp b/Source/FieldSolver/FiniteDifferenceSolver/MacroscopicEvolveE.cpp
index 4a2d940aa..448c9b57d 100644
--- a/Source/FieldSolver/FiniteDifferenceSolver/MacroscopicEvolveE.cpp
+++ b/Source/FieldSolver/FiniteDifferenceSolver/MacroscopicEvolveE.cpp
@@ -94,7 +94,7 @@ void FiniteDifferenceSolver::MacroscopicEvolveECartesian (
// Loop through the grids, and over the tiles within each grid
-#ifdef _OPENMP
+#ifdef AMREX_USE_OMP
#pragma omp parallel if (amrex::Gpu::notInLaunchRegion())
#endif
for ( MFIter mfi(*Efield[0], TilingIfNotGPU()); mfi.isValid(); ++mfi ) {