diff --git a/sys/include/9p.h b/sys/include/9p.h
index 377ebc437..fb2862438 100644
--- a/sys/include/9p.h
+++ b/sys/include/9p.h
@@ -226,6 +226,7 @@ int		chatty9p;
 void		respond(Req*, char*);
 void		responderror(Req*);
 void		threadpostmountsrv(Srv*, char*, char*, int);
+void		threadpostsharesrv(Srv*, char*, char*, char*, char*);
 void		threadlistensrv(Srv *s, char *addr);
 
 /*
diff --git a/sys/src/lib9p/thread.c b/sys/src/lib9p/thread.c
index e345d0886..e3912ea03 100644
--- a/sys/src/lib9p/thread.c
+++ b/sys/src/lib9p/thread.c
@@ -23,3 +23,10 @@ threadpostmountsrv(Srv *s, char *name, char *mtpt, int flag)
 	_forker = tforker;
 	_postmountsrv(s, name, mtpt, flag);
 }
+
+void
+threadpostsharesrv(Srv *s, char *name, char *mtpt, int flag)
+{
+	_forker = tforker;
+	_postmountsrv(s, name, mtpt, flag);
+}