diff --git a/src/proto/os_mswin.pro b/src/proto/os_mswin.pro
index 8cfcb43..cc660a6 100644
--- a/src/proto/os_mswin.pro
+++ b/src/proto/os_mswin.pro
@@ -43,9 +43,9 @@
 void serverSetName(char_u *name);
 char_u *serverGetVimNames(void);
 int serverSendReply(char_u *name, char_u *reply);
-int serverSendToVim(char_u *name, char_u *cmd, char_u **result, void *ptarget, int asExpr, int silent);
+int serverSendToVim(char_u *name, char_u *cmd, char_u **result, void *ptarget, int asExpr, int timeout, int silent);
 void serverForeground(char_u *name);
-char_u *serverGetReply(HWND server, int *expr_res, int remove, int wait);
+char_u *serverGetReply(HWND server, int *expr_res, int remove, int wait, int timeout);
 void serverProcessPendingMessages(void);
 char *charset_id2name(int id);
 char *quality_id2name(DWORD id);