diff --git a/parser.go b/parser.go
index 4471a48..45921ca 100644
--- a/parser.go
+++ b/parser.go
@@ -155,11 +155,11 @@ func (rce *RedisCommandExecutor) push(i interface{}) bool {
 }
 
 func asString(i interface{}) string {
-	switch i.(type) {
+	switch v := i.(type) {
 	case string:
-		return i.(string)
+		return v
 	case []byte:
-		return string(i.([]byte))
+		return string(v)
 	}
 	return fmt.Sprintf("%s", i)
 }