diff --git a/clientconn.go b/clientconn.go
index edbed8762c16..df1bb943add5 100644
--- a/clientconn.go
+++ b/clientconn.go
@@ -1059,6 +1059,7 @@ func (ac *addrConn) resetTransport() {
 				continue
 			}
 
+			backoffFor = 0
 			ac.mu.Lock()
 			reqHandshake := ac.dopts.reqHandshake
 			ac.mu.Unlock()