diff --git a/transport/transport.go b/transport/transport.go
index df67d57e8d79..b62f70290feb 100644
--- a/transport/transport.go
+++ b/transport/transport.go
@@ -341,6 +341,12 @@ func (s *Stream) finish(st *status.Status) {
 	close(s.done)
 }
 
+// GoString is implemented by Stream so context.String() won't
+// race when printing %#v.
+func (s *Stream) GoString() string {
+	return fmt.Sprintf("<stream: %p, %v>", s, s.method)
+}
+
 // The key to save transport.Stream in the context.
 type streamKey struct{}