diff --git a/transport/internet/splithttp/mux.go b/transport/internet/splithttp/mux.go
index f4d3e65f4..4897ace45 100644
--- a/transport/internet/splithttp/mux.go
+++ b/transport/internet/splithttp/mux.go
@@ -30,6 +30,7 @@ func (c *XmuxClient) AddRunning() {
 }
 
 func (c *XmuxClient) DoneRunning() {
+	c.Running.Add(-1)
 	c.maybeClose()
 }