diff --git a/src/tool_cfgable.c b/src/tool_cfgable.c
index bb27158326..5564e250d3 100644
--- a/src/tool_cfgable.c
+++ b/src/tool_cfgable.c
@@ -114,6 +114,8 @@ static void free_config_fields(struct OperationConfig *config)
   Curl_safefree(config->doh_url);
   Curl_safefree(config->cipher_list);
   Curl_safefree(config->proxy_cipher_list);
+  Curl_safefree(config->cipher13_list);
+  Curl_safefree(config->proxy_cipher13_list);
   Curl_safefree(config->cert);
   Curl_safefree(config->proxy_cert);
   Curl_safefree(config->cert_type);