diff --git a/homeassistant/components/upnp/config_flow.py b/homeassistant/components/upnp/config_flow.py
index 9352ae0a5ff..d1c2c4b3c0f 100644
--- a/homeassistant/components/upnp/config_flow.py
+++ b/homeassistant/components/upnp/config_flow.py
@@ -273,7 +273,7 @@ class UpnpFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
 
         title = _friendly_name_from_discovery(discovery)
         data = {
-            CONFIG_ENTRY_UDN: discovery["_udn"],
+            CONFIG_ENTRY_UDN: discovery[ssdp.ATTR_UPNP_UDN],
             CONFIG_ENTRY_ST: discovery[ssdp.ATTR_SSDP_ST],
             CONFIG_ENTRY_HOSTNAME: discovery["_host"],
         }