diff --git a/kwave/options/simulation_options.py b/kwave/options/simulation_options.py
index 366ede0c..78a30e46 100644
--- a/kwave/options/simulation_options.py
+++ b/kwave/options/simulation_options.py
@@ -307,7 +307,7 @@ def option_factory(kgrid: "kWaveGrid", options: SimulationOptions):
                 options.pml_y_alpha = val[-1]
             elif kgrid.dim == 3:
                 options.pml_x_alpha = val[0]
-                options.pml_y_alpha = val[1]
+                options.pml_y_alpha = val[len(val) // 2]
                 options.pml_z_alpha = val[-1]
 
         if options.save_to_disk_exit: