diff --git a/changes/479.fixed b/changes/479.fixed
new file mode 100644
index 00000000..284c238d
--- /dev/null
+++ b/changes/479.fixed
@@ -0,0 +1 @@
+Corrected the attribute used to reference the ControllerManagedDeviceGroup off a Controller object.
\ No newline at end of file
diff --git a/nautobot_ssot/integrations/aci/diffsync/adapters/aci.py b/nautobot_ssot/integrations/aci/diffsync/adapters/aci.py
index 9ff46107..f8d9ab89 100644
--- a/nautobot_ssot/integrations/aci/diffsync/adapters/aci.py
+++ b/nautobot_ssot/integrations/aci/diffsync/adapters/aci.py
@@ -435,8 +435,8 @@ def load_devices(self):
                 site=self.site,
                 site_tag=self.site,
                 controller_group=(
-                    self.job.apic.controller_managed_device_group.name
-                    if self.job.apic.controller_managed_device_group
+                    self.job.apic.controller_managed_device_groups.name
+                    if self.job.apic.controller_managed_device_groups
                     else ""
                 ),
             )