diff --git a/server.go b/server.go
index c8b3412..65218c7 100644
--- a/server.go
+++ b/server.go
@@ -515,7 +515,7 @@ func (server *Server) fastesUpstream(r *http.Request, lastModified time.Time) (r
 					updateCh <- idx
 
 					for cancelIdx, cancel := range cancelFuncs {
-						if cancelIdx == resultIdx || cancel == nil {
+						if cancelIdx == idx || cancel == nil {
 							continue
 						}
 						cancel()