diff --git a/conn/connpool/onetimepool.go b/conn/connpool/onetimepool.go
index 22e67b1..3158b09 100644
--- a/conn/connpool/onetimepool.go
+++ b/conn/connpool/onetimepool.go
@@ -75,5 +75,7 @@ func (p *OneTimePool) Run() error {
 
 func (p *OneTimePool) Close() error {
 	p.cancel()
+	// remove dialer references
+	p.Dialer = nil
 	return p.InFlightConns.Close()
 }