diff --git a/bar.go b/bar.go
index 687de07..811aafc 100644
--- a/bar.go
+++ b/bar.go
@@ -38,7 +38,7 @@
 // Statistics represents statistics of the progress bar.
 // Cantains: Total, Current, TimeElapsed, TimePerItemEstimate
 type Statistics struct {
-	Id                  int
+	ID                  int
 	Completed           bool
 	Total               int64
 	Current             int64
@@ -502,7 +502,7 @@
 
 func newStatistics(s *state) *Statistics {
 	return &Statistics{
-		Id:                  s.id,
+		ID:                  s.id,
 		Completed:           s.completed,
 		Total:               s.total,
 		Current:             s.current,
diff --git a/bar_test.go b/bar_test.go
index 0467fd9..493f9f2 100644
--- a/bar_test.go
+++ b/bar_test.go
@@ -234,7 +234,7 @@
 		name := fmt.Sprintf("b#%02d:", i)
 		bar := p.AddBarWithID(i, 100).
 			PrependFunc(func(s *mpb.Statistics, yw chan<- int, mw <-chan int) string {
-				if s.Id == 2 && s.Current >= 42 {
+				if s.ID == 2 && s.Current >= 42 {
 					panic(wantPanic)
 				}
 				return name