diff --git a/audio-linux.go b/audio-linux.go
index 18a2a22..ced79d8 100644
--- a/audio-linux.go
+++ b/audio-linux.go
@@ -98,7 +98,7 @@ func (a *audioStruct) recLoop(deinitNeededChan, deinitFinishedChan chan bool) {
 		}
 
 		// Do not send silence frames to the radio unnecessarily
-		if allZero(frameBuf[:n]) {
+		if isAllZero(frameBuf[:n]) {
 			continue
 		}
 		buf.Write(frameBuf[:n])
diff --git a/controlstream.go b/controlstream.go
index 24f131d..c6ac99e 100644
--- a/controlstream.go
+++ b/controlstream.go
@@ -5,7 +5,6 @@ import (
 	"encoding/binary"
 	"errors"
 	"fmt"
-	"strings"
 	"time"
 )
 
@@ -129,14 +128,6 @@ func (s *controlStream) sendRequestSerialAndAudio() error {
 	return nil
 }
 
-func (s *controlStream) parseNullTerminatedString(d []byte) (res string) {
-	nullIndex := strings.Index(string(d), "\x00")
-	if nullIndex > 0 {
-		res = string(d[:nullIndex])
-	}
-	return
-}
-
 func (s *controlStream) handleRead(r []byte) error {
 	switch len(r) {
 	case 64:
@@ -207,7 +198,7 @@ func (s *controlStream) handleRead(r []byte) error {
 			s.secondAuthTimer.Stop()
 			s.requestSerialAndAudioTimeout.Stop()
 
-			devName := s.parseNullTerminatedString(r[64:])
+			devName := parseNullTerminatedString(r[64:])
 			log.Print("got serial and audio request success, device name: ", devName)
 
 			// Stuff can change in the meantime because of a previous login...
diff --git a/util.go b/util.go
index b3daa4c..e8edf36 100644
--- a/util.go
+++ b/util.go
@@ -1,7 +1,9 @@
 package main
 
+import "strings"
+
 // Checks if all bytes are zeros
-func allZero(s []byte) bool {
+func isAllZero(s []byte) bool {
 	for _, v := range s {
 		if v != 0 {
 			return false
@@ -9,3 +11,11 @@ func allZero(s []byte) bool {
 	}
 	return true
 }
+
+func parseNullTerminatedString(d []byte) (res string) {
+	nullIndex := strings.Index(string(d), "\x00")
+	if nullIndex > 0 {
+		res = string(d[:nullIndex])
+	}
+	return
+}