1 files changed, 5 insertions, 1 deletions
diff --git a/Source/LaserParticleContainer.cpp b/Source/LaserParticleContainer.cpp
index 6ee79e9aa..cf669d32d 100644
--- a/Source/LaserParticleContainer.cpp
+++ b/Source/LaserParticleContainer.cpp
@@ -432,7 +432,11 @@ LaserParticleContainer::Evolve (int lev,
             if (cost) {
                 const Box& tbx = pti.tilebox();
                 wt = (amrex::second() - wt) / tbx.d_numPts();
-                (*cost)[pti].plus(wt, tbx);
+                FArrayBox* costfab = cost->fabPtr(pti);
+                AMREX_LAUNCH_HOST_DEVICE_LAMBDA ( tbx, work_box,
+                {
+                    costfab->plus(wt, work_box);
+                });
             }
 	}
     }