diff --git a/api/config_entry_inline_certificate.go b/api/config_entry_inline_certificate.go
index fca9fb20c4..bbf12ccaaf 100644
--- a/api/config_entry_inline_certificate.go
+++ b/api/config_entry_inline_certificate.go
@@ -12,7 +12,7 @@ type InlineCertificateConfigEntry struct {
 	// Certificate is the public certificate component of an x509 key pair encoded in raw PEM format.
 	Certificate string
 	// PrivateKey is the private key component of an x509 key pair encoded in raw PEM format.
-	PrivateKey string
+	PrivateKey string `alias:"private_key"`
 
 	Meta map[string]string `json:",omitempty"`