diff --git a/client.go b/client.go
index e816941..796b120 100644
--- a/client.go
+++ b/client.go
@@ -339,7 +339,8 @@ func filterCloseErr(err error) error {
 		return ErrClosed
 	default:
 		// if we have an epipe on a write or econnreset on a read , we cast to errclosed
-		if oerr, ok := err.(*net.OpError); ok && (oerr.Op == "write" || oerr.Op == "read") {
+		var oerr *net.OpError
+		if errors.As(err, &oerr) && (oerr.Op == "write" || oerr.Op == "read") {
 			serr, sok := oerr.Err.(*os.SyscallError)
 			if sok && ((serr.Err == syscall.EPIPE && oerr.Op == "write") ||
 				(serr.Err == syscall.ECONNRESET && oerr.Op == "read")) {