diff --git a/phigrape.cpp b/phigrape.cpp
index d3a734e..4dd4865 100644
--- a/phigrape.cpp
+++ b/phigrape.cpp
@@ -449,11 +449,11 @@ int main(int argc, char *argv[])
             black_hole_physics.set_softening(eps, config.live_smbh_custom_eps);
             black_hole_physics.adjust_softening(pot[0], pot[1], a[0], a[1], adot[0], adot[1]);
         }
-        if (config.binary_smbh_pn) black_hole_physics.adjust_post_newtonian(dt_min, a[0], a[1], adot[0], adot[1]);
     }
     if (config.binary_smbh_pn) {
         black_hole_physics.set_post_newtonian(config.pn_c, config.pn_usage.data());
         if (config.pn_usage[6]) black_hole_physics.set_spins(config.smbh1_spin.data(), config.smbh2_spin.data());
+        black_hole_physics.adjust_post_newtonian(dt_min, a[0], a[1], adot[0], adot[1]);
     }
 
     std::vector<double> pot_ext(N, 0.);