diff --git a/netbox_dns/signals/ipam_dnssync.py b/netbox_dns/signals/ipam_dnssync.py
index 4ea3fbce..d02bcae8 100644
--- a/netbox_dns/signals/ipam_dnssync.py
+++ b/netbox_dns/signals/ipam_dnssync.py
@@ -35,6 +35,9 @@
 
 @receiver(post_clean, sender=IPAddress)
 def ipam_dnssync_ipaddress_post_clean(instance, **kwargs):
+    if not instance.dns_name:
+        return
+
     if not isinstance(instance.address, IPNetwork):
         return