diff --git a/pkg/issuer/issuer.go b/pkg/issuer/issuer.go
index 67c006663..fd9904552 100644
--- a/pkg/issuer/issuer.go
+++ b/pkg/issuer/issuer.go
@@ -31,8 +31,8 @@ type Interface interface {
 	Prepare(context.Context, *v1alpha1.Certificate) error
 	// Issue attempts to issue a certificate as described by the certificate
 	// resource given
-	Issue(context.Context, *v1alpha1.Certificate) ([]byte, []byte, error)
+	Issue(context.Context, *v1alpha1.Certificate) ([]byte, []byte, []byte, error)
 	// Renew attempts to renew the certificate describe by the certificate
 	// resource given. If no certificate exists, an error is returned.
-	Renew(context.Context, *v1alpha1.Certificate) ([]byte, []byte, error)
+	Renew(context.Context, *v1alpha1.Certificate) ([]byte, []byte, []byte, error)
 }