diff --git a/bar.go b/bar.go
index 643941e..58c59a1 100644
--- a/bar.go
+++ b/bar.go
@@ -50,6 +50,7 @@
 	reqWidth          int
 	total             int64
 	current           int64
+	refill            int64
 	lastN             int64
 	iterated          bool
 	trimSpace         bool
@@ -132,13 +133,8 @@
 // Given default bar style is "[=>-]<+", refill rune is '+'.
 // To set bar style use mpb.BarStyle(string) BarOption.
 func (b *Bar) SetRefill(amount int64) {
-	type refiller interface {
-		SetRefill(int64)
-	}
 	b.operateState <- func(s *bState) {
-		if f, ok := s.baseF.(refiller); ok {
-			f.SetRefill(amount)
-		}
+		s.refill = amount
 	}
 }
 
@@ -446,10 +442,11 @@
 func newStatistics(tw int, s *bState) decor.Statistics {
 	return decor.Statistics{
 		ID:             s.id,
-		Completed:      s.completeFlushed,
+		AvailableWidth: tw,
 		Total:          s.total,
 		Current:        s.current,
-		AvailableWidth: tw,
+		Refill:         s.refill,
+		Completed:      s.completeFlushed,
 	}
 }
 
diff --git a/bar_filler_bar.go b/bar_filler_bar.go
index 8a2143f..2b6d31a 100644
--- a/bar_filler_bar.go
+++ b/bar_filler_bar.go
@@ -94,10 +94,6 @@
 	s.reverse = reverse
 }
 
-func (s *barFiller) SetRefill(amount int64) {
-	s.refill = amount
-}
-
 func (s *barFiller) Fill(w io.Writer, reqWidth int, stat decor.Statistics) {
 	width := internal.WidthForBarFiller(reqWidth, stat.AvailableWidth)
 
@@ -126,8 +122,8 @@
 		index++
 	}
 
-	if s.refill > 0 {
-		refill = int(internal.PercentageRound(stat.Total, int64(s.refill), width)) - index
+	if stat.Refill > 0 {
+		refill = int(internal.PercentageRound(stat.Total, int64(stat.Refill), width)) - index
 		if refill > cwidth {
 			refill = cwidth
 		}
diff --git a/decor/decorator.go b/decor/decorator.go
index 206fe79..e81fae3 100644
--- a/decor/decorator.go
+++ b/decor/decorator.go
@@ -48,10 +48,11 @@
 // may need.
 type Statistics struct {
 	ID             int
-	Completed      bool
+	AvailableWidth int
 	Total          int64
 	Current        int64
-	AvailableWidth int
+	Refill         int64
+	Completed      bool
 }
 
 // Decorator interface.