--- a/src/os/win32/ngx_socket.h
+++ b/src/os/win32/ngx_socket.h
@@ -35,6 +35,62 @@ int ngx_blocking(ngx_socket_t s);
 #define ngx_close_socket_n  "closesocket()"
 
 
+#ifndef WSAID_ACCEPTEX
+
+typedef BOOL (PASCAL FAR * LPFN_ACCEPTEX)(
+    IN SOCKET sListenSocket,
+    IN SOCKET sAcceptSocket,
+    IN PVOID lpOutputBuffer,
+    IN DWORD dwReceiveDataLength,
+    IN DWORD dwLocalAddressLength,
+    IN DWORD dwRemoteAddressLength,
+    OUT LPDWORD lpdwBytesReceived,
+    IN LPOVERLAPPED lpOverlapped
+    );
+
+#define WSAID_ACCEPTEX \
+        {0xb5367df1,0xcbac,0x11cf,{0x95,0xca,0x00,0x80,0x5f,0x48,0xa1,0x92}}
+
+#endif
+
+
+#ifndef WSAID_GETACCEPTEXSOCKADDRS
+
+typedef VOID (PASCAL FAR * LPFN_GETACCEPTEXSOCKADDRS)(
+    IN PVOID lpOutputBuffer,
+    IN DWORD dwReceiveDataLength,
+    IN DWORD dwLocalAddressLength,
+    IN DWORD dwRemoteAddressLength,
+    OUT struct sockaddr **LocalSockaddr,
+    OUT LPINT LocalSockaddrLength,
+    OUT struct sockaddr **RemoteSockaddr,
+    OUT LPINT RemoteSockaddrLength
+    );
+
+#define WSAID_GETACCEPTEXSOCKADDRS \
+        {0xb5367df2,0xcbac,0x11cf,{0x95,0xca,0x00,0x80,0x5f,0x48,0xa1,0x92}}
+
+#endif
+
+
+#ifndef LPFN_TRANSMITFILE
+
+typedef BOOL (PASCAL FAR * LPFN_TRANSMITFILE)(
+    IN SOCKET hSocket,
+    IN HANDLE hFile,
+    IN DWORD nNumberOfBytesToWrite,
+    IN DWORD nNumberOfBytesPerSend,
+    IN LPOVERLAPPED lpOverlapped,
+    IN LPTRANSMIT_FILE_BUFFERS lpTransmitBuffers,
+    IN DWORD dwReserved
+    );
+
+#define WSAID_TRANSMITFILE \
+        {0xb5367df0,0xcbac,0x11cf,{0x95,0xca,0x00,0x80,0x5f,0x48,0xa1,0x92}}
+
+#endif
+
+
 extern LPFN_ACCEPTEX              acceptex;
 extern LPFN_GETACCEPTEXSOCKADDRS  getacceptexsockaddrs;
 extern LPFN_TRANSMITFILE          transmitfile;