diff --git a/caddytls/client.go b/caddytls/client.go
index c754ab1c..a051880f 100644
--- a/caddytls/client.go
+++ b/caddytls/client.go
@@ -236,9 +236,11 @@ func (c *ACMEClient) Renew(name string) error {
 	var newCertMeta acme.CertificateResource
 	var success bool
 	for attempts := 0; attempts < 2; attempts++ {
+		namesObtaining.Add([]string{name})
 		acmeMu.Lock()
 		newCertMeta, err = c.RenewCertificate(certMeta, true)
 		acmeMu.Unlock()
+		namesObtaining.Remove([]string{name})
 		if err == nil {
 			success = true
 			break
diff --git a/caddytls/config.go b/caddytls/config.go
index 89ccafd7..f1dcff84 100644
--- a/caddytls/config.go
+++ b/caddytls/config.go
@@ -214,9 +214,11 @@ func (c *Config) renewCertName(name string, allowPrompts bool) error {
 	var newCertMeta acme.CertificateResource
 	var success bool
 	for attempts := 0; attempts < 2; attempts++ {
+		namesObtaining.Add([]string{name})
 		acmeMu.Lock()
 		newCertMeta, err = client.RenewCertificate(certMeta, true)
 		acmeMu.Unlock()
+		namesObtaining.Remove([]string{name})
 		if err == nil {
 			success = true
 			break