--- a/src/os/win32/ngx_os.h
+++ b/src/os/win32/ngx_os.h
@@ -20,11 +20,12 @@ typedef ssize_t (*ngx_recv_pt)(ngx_conne
 typedef ssize_t (*ngx_recv_chain_pt)(ngx_connection_t *c, ngx_chain_t *in);
 typedef ssize_t (*ngx_send_pt)(ngx_connection_t *c, u_char *buf, size_t size);
 typedef ngx_chain_t *(*ngx_send_chain_pt)(ngx_connection_t *c, ngx_chain_t *in,
-                                          off_t limit);
+    off_t limit);
 
 typedef struct {
     ngx_recv_pt        recv;
     ngx_recv_chain_pt  recv_chain;
+    ngx_recv_pt        udp_recv;
     ngx_send_pt        send;
     ngx_send_chain_pt  send_chain;
     ngx_uint_t         flags;
@@ -36,11 +37,14 @@ void ngx_os_status(ngx_log_t *log);
 
 ssize_t ngx_wsarecv(ngx_connection_t *c, u_char *buf, size_t size);
 ssize_t ngx_overlapped_wsarecv(ngx_connection_t *c, u_char *buf, size_t size);
+ssize_t ngx_udp_wsarecv(ngx_connection_t *c, u_char *buf, size_t size);
+ssize_t ngx_udp_overlapped_wsarecv(ngx_connection_t *c, u_char *buf,
+    size_t size);
 ssize_t ngx_wsarecv_chain(ngx_connection_t *c, ngx_chain_t *chain);
 ngx_chain_t *ngx_wsasend_chain(ngx_connection_t *c, ngx_chain_t *in,
-                               off_t limit);
+    off_t limit);
 ngx_chain_t *ngx_overlapped_wsasend_chain(ngx_connection_t *c, ngx_chain_t *in,
-                                          off_t limit);
+    off_t limit);
 
 
 extern ngx_os_io_t  ngx_os_io;