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-rw-r--r--Source/Utils/WarpXUtil.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/Source/Utils/WarpXUtil.cpp b/Source/Utils/WarpXUtil.cpp
index b7a046eb4..c90850536 100644
--- a/Source/Utils/WarpXUtil.cpp
+++ b/Source/Utils/WarpXUtil.cpp
@@ -129,7 +129,7 @@ void ConvertLabParamsToBoost()
*/
void NullifyMF(amrex::MultiFab& mf, int lev, amrex::Real zmin, amrex::Real zmax){
WARPX_PROFILE("WarpXUtil::NullifyMF()");
-#ifdef _OPENMP
+#ifdef AMREX_USE_OMP
#pragma omp parallel if (Gpu::notInLaunchRegion())
#endif
for(amrex::MFIter mfi(mf, amrex::TilingIfNotGPU()); mfi.isValid(); ++mfi){