diff --git a/intern/cycles/blender/addon/version_update.py b/intern/cycles/blender/addon/version_update.py
index 7c57bdf453c..827f84b9873 100644
--- a/intern/cycles/blender/addon/version_update.py
+++ b/intern/cycles/blender/addon/version_update.py
@@ -219,9 +219,12 @@ def do_versions(self):
 
             if version <= (2, 93, 16):
                 cscene = scene.cycles
-                if scene.render.use_simplify and \
-                   (cscene.ao_bounces or cscene.ao_bounces_render):
+                ao_bounces = cscene.get("ao_bounces", 0)
+                ao_bounces_render = cscene.get("ao_bounces_render", 0)
+                if scene.render.use_simplify and (ao_bounces or ao_bounces_render):
                     cscene.use_fast_gi = True
+                    cscene.ao_bounces = ao_bounces
+                    cscene.ao_bounces_render = ao_bounces_render
                 else:
                     cscene.ao_bounces = 1
                     cscene.ao_bounces_render = 1