diff --git a/src/os/win32/ngx_socket.h b/src/os/win32/ngx_socket.h
index ab56bc8b3..5b6138944 100644
--- a/src/os/win32/ngx_socket.h
+++ b/src/os/win32/ngx_socket.h
@@ -14,6 +14,8 @@
 
 
 #define NGX_WRITE_SHUTDOWN SD_SEND
+#define NGX_READ_SHUTDOWN  SD_RECEIVE
+#define NGX_RDWR_SHUTDOWN  SD_BOTH
 
 
 typedef SOCKET  ngx_socket_t;