diff --git a/visu.py b/visu.py
index d836ed7..cf0306f 100644
--- a/visu.py
+++ b/visu.py
@@ -4,7 +4,7 @@ def add_domain_bounds(plotter,bounds,color='black',line_width=2.):
     plotter.add_mesh(domain,color=color,style='wireframe',line_width=line_width,opacity=0.999,lighting=False)
     return
 
-def enable_shadows_hacked():
+def enable_shadows_hacked(pl):
     # Reimplements pyvistas "enable_shadows()" method to also render translucent 
     # objects (without shadows). Can be used to add objects which do not throw
     # shadows (but may look weird) by setting their opacity to a value close to 1,