1 files changed, 2 insertions, 6 deletions
diff --git a/src/strings/replace.go b/src/strings/replace.go
index dbda950194..9ddf5e1e3f 100644
--- a/src/strings/replace.go
+++ b/src/strings/replace.go
@@ -308,10 +308,6 @@ func (w *appendSliceWriter) WriteString(s string) (int, error) {
 	return len(s), nil
 }
 
-type stringWriterIface interface {
-	WriteString(string) (int, error)
-}
-
 type stringWriter struct {
 	w io.Writer
 }
@@ -320,8 +316,8 @@ func (w stringWriter) WriteString(s string) (int, error) {
 	return w.w.Write([]byte(s))
 }
 
-func getStringWriter(w io.Writer) stringWriterIface {
-	sw, ok := w.(stringWriterIface)
+func getStringWriter(w io.Writer) io.StringWriter {
+	sw, ok := w.(io.StringWriter)
 	if !ok {
 		sw = stringWriter{w}
 	}