diff --git a/_examples/merge/main.go b/_examples/merge/main.go
index 2efabe1..cde6c42 100644
--- a/_examples/merge/main.go
+++ b/_examples/merge/main.go
@@ -21,9 +21,11 @@
 		var pdecorators mpb.BarOption
 		if i == 0 {
 			pdecorators = mpb.PrependDecorators(
-				// Merge to sync width with decorators on lines 37 and 38
 				decor.Merge(
-					newVariadicSpinner(decor.WCSyncSpace),
+					decor.OnComplete(
+						newVariadicSpinner(decor.WCSyncSpace),
+						"done",
+					),
 					decor.WCSyncSpace, // Placeholder
 				),
 			)
@@ -58,27 +60,19 @@
 
 func newVariadicSpinner(wc decor.WC) decor.Decorator {
 	d := &variadicSpinner{
-		WC: wc.Init(),
-		d:  decor.Spinner(nil),
+		WC:   wc.Init(),
+		base: decor.Spinner(nil),
 	}
 	return d
 }
 
 type variadicSpinner struct {
 	decor.WC
-	d        decor.Decorator
-	complete *string
+	base decor.Decorator
 }
 
 func (d *variadicSpinner) Decor(st *decor.Statistics) string {
-	if st.Completed && d.complete != nil {
-		return d.FormatMsg(*d.complete)
-	}
-	msg := d.d.Decor(st)
+	msg := d.base.Decor(st)
 	msg = strings.Repeat(msg, int(st.Current/3))
 	return d.FormatMsg(msg)
 }
-
-func (d *variadicSpinner) OnCompleteMessage(msg string) {
-	d.complete = &msg
-}
diff --git a/bar_option.go b/bar_option.go
index d938e41..bb79ac6 100644
--- a/bar_option.go
+++ b/bar_option.go
@@ -17,9 +17,7 @@
 func (s *bState) addDecorators(dest *[]decor.Decorator, decorators ...decor.Decorator) {
 	for _, decorator := range decorators {
 		if mw, ok := decorator.(mergeWrapper); ok {
-			dd := mw.MergeUnwrap()
-			s.mDecorators = append(s.mDecorators, dd[0])
-			*dest = append(*dest, dd[1:]...)
+			*dest = append(*dest, mw.MergeUnwrap()...)
 		}
 		*dest = append(*dest, decorator)
 	}
diff --git a/decor/merge.go b/decor/merge.go
index b0ed244..3a67883 100644
--- a/decor/merge.go
+++ b/decor/merge.go
@@ -25,9 +25,12 @@
 	}
 	decorator.SetConf(&WC{})
 	for i, wc := range placeholders {
+		if (wc.C & DSyncWidth) == 0 {
+			return decorator
+		}
 		md.placeHolders[i] = &placeHolderDecorator{
-			WC:    wc.Init(),
-			wsync: make(chan int),
+			WC:  wc.Init(),
+			wch: make(chan int),
 		}
 	}
 	return md
@@ -40,10 +43,9 @@
 }
 
 func (d *mergeDecorator) MergeUnwrap() []Decorator {
-	decorators := make([]Decorator, len(d.placeHolders)+1)
-	decorators[0] = d.Decorator
+	decorators := make([]Decorator, len(d.placeHolders))
 	for i, ph := range d.placeHolders {
-		decorators[i+1] = ph
+		decorators[i] = ph
 	}
 	return decorators
 }
@@ -52,32 +54,36 @@
 	return d.wc.Sync()
 }
 
+func (d *mergeDecorator) Base() Decorator {
+	return d.Decorator
+}
+
 func (d *mergeDecorator) Decor(st *Statistics) string {
 	msg := d.Decorator.Decor(st)
 	msgLen := utf8.RuneCountInString(msg)
 
-	var pWidth int
+	var space int
 	for _, ph := range d.placeHolders {
-		pWidth += <-ph.wsync
+		space += <-ph.wch
 	}
 
-	d.wc.wsync <- msgLen - pWidth
+	d.wc.wsync <- msgLen - space
 
 	max := <-d.wc.wsync
 	if (d.wc.C & DextraSpace) != 0 {
 		max++
 	}
-	return fmt.Sprintf(fmt.Sprintf(d.wc.dynFormat, max+pWidth), msg)
+	return fmt.Sprintf(fmt.Sprintf(d.wc.dynFormat, max+space), msg)
 }
 
 type placeHolderDecorator struct {
 	WC
-	wsync chan int
+	wch chan int
 }
 
 func (d *placeHolderDecorator) Decor(st *Statistics) string {
 	go func() {
-		d.wsync <- utf8.RuneCountInString(d.FormatMsg(""))
+		d.wch <- utf8.RuneCountInString(d.FormatMsg(""))
 	}()
 	return ""
 }
diff --git a/decor/on_complete.go b/decor/on_complete.go
index 1c88684..bb4a563 100644
--- a/decor/on_complete.go
+++ b/decor/on_complete.go
@@ -9,7 +9,6 @@
 func OnComplete(decorator Decorator, message string) Decorator {
 	d := &onCompleteWrapper{
 		Decorator: decorator,
-		wc:        decorator.GetConf(),
 		msg:       message,
 	}
 	return d
@@ -17,13 +16,17 @@
 
 type onCompleteWrapper struct {
 	Decorator
-	wc  WC
 	msg string
 }
 
 func (d *onCompleteWrapper) Decor(st *Statistics) string {
 	if st.Completed {
-		return d.wc.FormatMsg(d.msg)
+		wc := d.GetConf()
+		return wc.FormatMsg(d.msg)
 	}
 	return d.Decorator.Decor(st)
 }
+
+func (d *onCompleteWrapper) Base() Decorator {
+	return d.Decorator
+}