diff --git a/cmd/peco/peco.go b/cmd/peco/peco.go
index 5c18b98..c527c97 100644
--- a/cmd/peco/peco.go
+++ b/cmd/peco/peco.go
@@ -161,6 +161,10 @@ func main() {
 		}
 	}
 
+	if len(opts.OptPrompt) > 0 {
+		ctx.SetPrompt(opts.OptPrompt)
+	}
+
 	// Deprecated. --no-ignore-case options will be removed in later.
 	if opts.OptNoIgnoreCase {
 		ctx.SetCurrentMatcher(peco.CaseSensitiveMatch)
@@ -225,10 +229,6 @@ func main() {
 		view.Refresh()
 	}
 
-	if len(opts.OptPrompt) > 0 {
-		ctx.SetPrompt([]rune(opts.OptPrompt))
-	}
-
 	ctx.WaitDone()
 
 	st = ctx.ExitStatus
diff --git a/ctx.go b/ctx.go
index 6db75cf..2748e10 100644
--- a/ctx.go
+++ b/ctx.go
@@ -43,7 +43,6 @@ type Ctx struct {
 	result              []Match
 	mutex               sync.Mutex
 	query               []rune
-	prompt              []rune
 	caretPos            int
 	currentLine         int
 	currentPage         *PageInfo
@@ -69,7 +68,6 @@ func NewCtx(o CtxOptions) *Ctx {
 		[]Match{},
 		sync.Mutex{},
 		[]rune{},
-		[]rune{},
 		0,
 		o.InitialIndex(),
 		&PageInfo{0, 1, 0},
@@ -289,6 +287,6 @@ func (s *signalHandler) Loop() {
 	}
 }
 
-func (c *Ctx) SetPrompt(p []rune) {
-	c.prompt = p
+func (c *Ctx) SetPrompt(p string) {
+	c.config.Prompt = p
 }