diff --git a/src/tool_cfgable.c b/src/tool_cfgable.c
index 21c0cc19cd..4702045739 100644
--- a/src/tool_cfgable.c
+++ b/src/tool_cfgable.c
@@ -90,6 +90,8 @@ static void free_config_fields(struct OperationConfig *config)
 
   Curl_safefree(config->netrc_file);
   Curl_safefree(config->output_dir);
+  Curl_safefree(config->proto_str);
+  Curl_safefree(config->proto_redir_str);
 
   urlnode = config->url_list;
   while(urlnode) {
diff --git a/src/tool_paramhlp.c b/src/tool_paramhlp.c
index ae9fb1377a..c4fd0a192e 100644
--- a/src/tool_paramhlp.c
+++ b/src/tool_paramhlp.c
@@ -433,6 +433,7 @@ ParameterError proto2num(struct OperationConfig *config,
     result = curlx_dyn_addf(&obuf, "%s,", protoset[proto]);
   free((char *) protoset);
   curlx_dyn_setlen(&obuf, curlx_dyn_len(&obuf) - 1);
+  free(*ostr);
   *ostr = curlx_dyn_ptr(&obuf);
 
   return *ostr ? PARAM_OK : PARAM_NO_MEM;