diff --git a/src/compas_timber/ghpython/components/CT_ShowAssembly/code.py b/src/compas_timber/ghpython/components/CT_ShowAssembly/code.py
index be367ea73..662b5c543 100644
--- a/src/compas_timber/ghpython/components/CT_ShowAssembly/code.py
+++ b/src/compas_timber/ghpython/components/CT_ShowAssembly/code.py
@@ -8,7 +8,6 @@ def RunScript(self, Assembly):
         if not Assembly:
             self.AddRuntimeMessage(Warning, "Input parameter Assembly failed to collect data")
             return
-        Assembly = Assembly.copy()  # we're gonna be making changes to upstream objects
 
         Brep = []
         for beam in Assembly.beams: