diff --git a/enc_comma.go b/enc_comma.go
index 0b7cb3b..10337fb 100644
--- a/enc_comma.go
+++ b/enc_comma.go
@@ -15,13 +15,6 @@ func (e *Encoder) end() {
 
 func (e *Encoder) current() int { return len(e.first) - 1 }
 
-func (e *Encoder) resetComma() {
-	if len(e.first) == 0 {
-		return
-	}
-	e.first[e.current()] = true
-}
-
 // comma should be called before any new value.
 func (e *Encoder) comma() {
 	// Writing commas.
diff --git a/enc_comma_test.go b/enc_comma_test.go
index 5baed29..a9d42f4 100644
--- a/enc_comma_test.go
+++ b/enc_comma_test.go
@@ -60,7 +60,6 @@ func BenchmarkEncoder_comma_overhead(b *testing.B) {
 	for i := 0; i < b.N; i++ {
 		e.ArrStart()
 		e.comma()
-		e.resetComma()
 		e.Reset()
 	}
 }