diff --git a/operation.go b/operation.go
index 14ade31..2c93561 100644
--- a/operation.go
+++ b/operation.go
@@ -32,6 +32,10 @@ type Operation struct {
 	*opVim
 }
 
+func (o *Operation) SetBuffer(what string) {
+	o.buf.Set([]rune(what))
+}
+
 type wrapWriter struct {
 	r      *Operation
 	t      *Terminal
diff --git a/readline.go b/readline.go
index 3f02a83..b0242f7 100644
--- a/readline.go
+++ b/readline.go
@@ -242,6 +242,11 @@ func (i *Instance) Readline() (string, error) {
 	return i.Operation.String()
 }
 
+func (i *Instance) ReadlineWithDefault(what string) (string, error) {
+	i.Operation.SetBuffer(what)
+	return i.Operation.String()
+}
+
 func (i *Instance) SaveHistory(content string) error {
 	return i.Operation.SaveHistory(content)
 }