diff --git a/capnp/capnp.pyx b/capnp/capnp.pyx
index d193098..73f326b 100644
--- a/capnp/capnp.pyx
+++ b/capnp/capnp.pyx
@@ -1600,7 +1600,7 @@ cdef class RpcServer:
         del self.thisptr
 
     def run_forever(self):
-        return _VoidPromise()._init(deref(self.network.thisptr).onDisconnect())
+        _VoidPromise()._init(deref(self.network.thisptr).onDisconnect()).wait()
 
     # TODO: add restore functionality here?