diff --git a/src/ssl_ckch.c b/src/ssl_ckch.c
index 0cbc984dc..90887c55b 100644
--- a/src/ssl_ckch.c
+++ b/src/ssl_ckch.c
@@ -4841,6 +4841,9 @@ out:
 /* freeing the content of a ckch_conf structure */
 void ckch_conf_clean(struct ckch_conf *conf)
 {
+	if (!conf)
+		return;
+
 	free(conf->crt);
 	free(conf->key);
 	free(conf->ocsp);