1 files changed, 6 insertions, 1 deletions

diff --git a/Source/WarpX.H b/Source/WarpX.H
index 20d4e4210..2d1124c06 100644
--- a/Source/WarpX.H
+++ b/Source/WarpX.H
@@ -187,6 +187,11 @@ public:
      */
     static amrex::Vector<ParticleBoundaryType> particle_boundary_hi;
 
+    //! Integer that corresponds to the order of the PSATD solution
+    //! (whether the PSATD equations are derived from first-order or
+    //! second-order solution)
+    static short psatd_solution_type;
+
     //! Integers that correspond to the time dependency of J (constant, linear)
     //! and rho (linear, quadratic) for the PSATD algorithm
     static short J_in_time;
@@ -1639,7 +1644,7 @@ private:
         const int icomp, const int dcomp, const bool apply_kspace_filter=true);
 
     /**
-     * \brief Copy rho_new to rho_old in spectral space
+     * \brief Copy rho_new to rho_old in spectral space (when rho is linear in time)
      */
     void PSATDMoveRhoNewToRhoOld ();