diff --git a/errgroup/errgroup.go b/errgroup/errgroup.go
index 1eab2fd..4c0850a 100644
--- a/errgroup/errgroup.go
+++ b/errgroup/errgroup.go
@@ -17,7 +17,8 @@ type token struct{}
 // A Group is a collection of goroutines working on subtasks that are part of
 // the same overall task.
 //
-// A zero Group is valid and does not cancel on error.
+// A zero Group is valid, has no limit on the number of active goroutines,
+// and does not cancel on error.
 type Group struct {
 	cancel func()