diff --git a/machinery/src/webrtc/aac_transcoder_stub.go b/machinery/src/webrtc/aac_transcoder_stub.go
index d56cd62..1b0a8cf 100644
--- a/machinery/src/webrtc/aac_transcoder_stub.go
+++ b/machinery/src/webrtc/aac_transcoder_stub.go
@@ -10,6 +10,8 @@ import (
 	"errors"
 	"io"
 	"os/exec"
+	"strconv"
+	"strings"
 	"sync"
 	"time"