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-rw-r--r--Source/Evolve/WarpXEvolveEM.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/Source/Evolve/WarpXEvolveEM.cpp b/Source/Evolve/WarpXEvolveEM.cpp
index b5fd52bdc..fe0fb9157 100644
--- a/Source/Evolve/WarpXEvolveEM.cpp
+++ b/Source/Evolve/WarpXEvolveEM.cpp
@@ -583,7 +583,7 @@ WarpX::ComputeDt ()
* simulation box passes input parameter zmax_plasma_to_compute_max_step.
*/
void
-WarpX::computeMaxStepBoostAccelerator(amrex::Geometry a_geom){
+WarpX::computeMaxStepBoostAccelerator(const amrex::Geometry& a_geom){
// Sanity checks: can use zmax_plasma_to_compute_max_step only if
// the moving window and the boost are all in z direction.
AMREX_ALWAYS_ASSERT_WITH_MESSAGE(