diff --git a/src/proto/if_xcmdsrv.pro b/src/proto/if_xcmdsrv.pro
new file mode 100644
index 0000000..dd6a120
--- /dev/null
+++ b/src/proto/if_xcmdsrv.pro
@@ -0,0 +1,11 @@
+/* if_xcmdsrv.c */
+int serverRegisterName __ARGS((Display *dpy, char_u *name));
+void serverChangeRegisteredWindow __ARGS((Display *dpy, Window newwin));
+int serverSendToVim __ARGS((Display *dpy, char_u *name, char_u *cmd, char_u **result, Window *server, int asExpr, int localLoop, int silent));
+char_u *serverGetVimNames __ARGS((Display *dpy));
+Window serverStrToWin __ARGS((char_u *str));
+int serverSendReply __ARGS((char_u *name, char_u *str));
+int serverReadReply __ARGS((Display *dpy, Window win, char_u **str, int localLoop));
+int serverPeekReply __ARGS((Display *dpy, Window win, char_u **str));
+void serverEventProc __ARGS((Display *dpy, XEvent *eventPtr));
+/* vim: set ft=c : */