diff --git a/pkg/apis/externaldns/types.go b/pkg/apis/externaldns/types.go
index 446a57316..530ab5d5a 100644
--- a/pkg/apis/externaldns/types.go
+++ b/pkg/apis/externaldns/types.go
@@ -228,7 +228,7 @@ var defaultConfig = &Config{
 	AWSZoneType:                 "",
 	AWSZoneTagFilter:            []string{},
 	AWSAssumeRole:               "",
-	AWSAssumeRoleExternalId:     "",
+	AWSAssumeRoleExternalID:     "",
 	AWSBatchChangeSize:          1000,
 	AWSBatchChangeInterval:      time.Second,
 	AWSEvaluateTargetHealth:     true,