diff --git a/src/apps/httpd/httpd.c b/src/apps/httpd/httpd.c
index 242e0244..00bd21a6 100644
--- a/src/apps/httpd/httpd.c
+++ b/src/apps/httpd/httpd.c
@@ -2552,7 +2552,7 @@ http_recv(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err)
        if (hs->post_content_len_left == 0)
 #endif /* LWIP_HTTPD_SUPPORT_POST */
         {
-          LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_TRACE, ("http_recv: data %p len %"S32_F"\n", hs->file, hs->left));
+          LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_TRACE, ("http_recv: data %p len %"S32_F"\n", (const void*)hs->file, hs->left));
           http_send(pcb, hs);
         }
       } else if (parsed == ERR_ARG) {