diff --git a/rpc/user_center.go b/rpc/user_center.go
index 05d3592d0bd23b78aa86ff3d21db160346444465..118f31236f0773f67c8b93c988329996e18c725b 100644
--- a/rpc/user_center.go
+++ b/rpc/user_center.go
@@ -67,7 +67,9 @@ func (b *Builder) UpdateState(addrs []string) {
 	for i, s := range addrs {
 		as[i] = resolver.Address{Addr: s}
 	}
-	b.cc.UpdateState(resolver.State{Addresses: as})
+	if b.cc != nil {
+		_ = b.cc.UpdateState(resolver.State{Addresses: as})
+	}
 }
 
 func init() {