diff --git a/netbox/dcim/forms.py b/netbox/dcim/forms.py
index f0b0f6d52..c3a545f7c 100644
--- a/netbox/dcim/forms.py
+++ b/netbox/dcim/forms.py
@@ -953,6 +953,7 @@ class ChildDeviceCSVForm(BaseDeviceCSVForm):
     cluster = forms.ModelChoiceField(
         queryset=Cluster.objects.all(),
         to_field_name='name',
+        required=False,
         help_text='Virtualization cluster',
         error_messages={
             'invalid_choice': 'Invalid cluster name.',