diff --git a/pkg/apis/externaldns/types.go b/pkg/apis/externaldns/types.go
index d614154773..a179fc82a6 100644
--- a/pkg/apis/externaldns/types.go
+++ b/pkg/apis/externaldns/types.go
@@ -147,7 +147,6 @@ type Config struct {
 	RFC2136KerberosRealm              string
 	RFC2136KerberosUsername           string
 	RFC2136KerberosPassword           string
-	RFC2136KerberosRealm              string
 	RFC2136TSIGKeyName                string
 	RFC2136TSIGSecret                 string `secure:"yes"`
 	RFC2136TSIGSecretAlg              string