1 files changed, 8 insertions, 6 deletions
diff --git a/Source/FieldSolver/SpectralSolver/SpectralKSpace.cpp b/Source/FieldSolver/SpectralSolver/SpectralKSpace.cpp
index aee131324..d0355fc1e 100644
--- a/Source/FieldSolver/SpectralSolver/SpectralKSpace.cpp
+++ b/Source/FieldSolver/SpectralSolver/SpectralKSpace.cpp
@@ -1,3 +1,10 @@
+/* Copyright 2019-2020 Andrew Myers, Maxence Thevenet, Remi Lehe
+ * Revathi Jambunathan
+ *
+ * This file is part of WarpX.
+ *
+ * License: BSD-3-Clause-LBNL
+ */
 #include <WarpXConst.H>
 #include <SpectralKSpace.H>
 #include <cmath>
@@ -144,12 +151,7 @@ SpectralKSpace::getSpectralShiftFactor( const DistributionMapping& dm,
         }
         const Complex I{0,1};
         for (int i=0; i<k.size(); i++ ){
-#ifdef AMREX_USE_GPU
-            shift[i] = thrust::exp( I*sign*k[i]*0.5*dx[i_dim] );
-#else
-            shift[i] = std::exp( I*sign*k[i]*0.5*dx[i_dim] );
-#endif
-
+            shift[i] = exp( I*sign*k[i]*0.5*dx[i_dim]);
         }
     }
     return shift_factor;