diff --git a/adapter/outbound/singmux.go b/adapter/outbound/singmux.go
index 555a0ecb..9a977318 100644
--- a/adapter/outbound/singmux.go
+++ b/adapter/outbound/singmux.go
@@ -97,7 +97,7 @@ func (s *SingMux) ListenPacketContext(ctx context.Context, metadata *C.Metadata,
 
 func (s *SingMux) SupportUDP() bool {
 	if s.onlyTcp {
-		return s.ProxyAdapter.SupportUOT()
+		return s.ProxyAdapter.SupportUDP()
 	}
 	return true
 }