diff --git a/http_server/http_client/dap_http_client.c b/http_server/http_client/dap_http_client.c
index 6c41e072a53799dd92533f224f8e4ef8796394f8..377b67edf382de4df205289464c88a5119b683a8 100755
--- a/http_server/http_client/dap_http_client.c
+++ b/http_server/http_client/dap_http_client.c
@@ -394,11 +394,11 @@ void dap_http_client_out_header_generate(dap_http_client_t *cl_ht)
 {
     char buf[1024];
     time_t current_time=time(NULL);
-    time_to_rfc822(buf,sizeof(buf),current_time);
+    dap_time_to_str_rfc822(buf,sizeof(buf),current_time);
     dap_http_header_add(&cl_ht->out_headers,"Date",buf);
     if(cl_ht->reply_status_code==200){
         if(cl_ht->out_last_modified){
-            time_to_rfc822(buf,sizeof(buf),cl_ht->out_last_modified);
+            dap_time_to_str_rfc822(buf,sizeof(buf),cl_ht->out_last_modified);
             dap_http_header_add(&cl_ht->out_headers,"Last-Modified",buf);
         }
         if(cl_ht->out_content_type[0]){