diff --git a/controlstream.go b/controlstream.go
index 75cb571..c41b98d 100644
--- a/controlstream.go
+++ b/controlstream.go
@@ -174,7 +174,7 @@ func (s *controlStream) handleRead(r []byte) error {
 			}
 		}
 	case 80:
-		if bytes.Equal(r[:6], []byte{0x50, 0x00, 0x00, 0x00, 0x00, 0x00}) && bytes.Equal(r[48:51], []byte{0xff, 0xff, 0xff}) {
+		if bytes.Equal(r[:6], []byte{0x50, 0x00, 0x00, 0x00, 0x00, 0x00}) {
 			// Example answer from radio: 0x50, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00,
 			//							  0x86, 0x1f, 0x2f, 0xcc, 0x03, 0x03, 0x89, 0x29,
 			//							  0x00, 0x00, 0x00, 0x40, 0x02, 0x03, 0x00, 0x52,
@@ -186,7 +186,12 @@ func (s *controlStream) handleRead(r []byte) error {
 			//							  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			//							  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
 
-			return errors.New("auth failed")
+			if bytes.Equal(r[48:51], []byte{0xff, 0xff, 0xff}) {
+				return errors.New("auth failed")
+			}
+			if bytes.Equal(r[48:51], []byte{0x00, 0x00, 0x00}) && r[64] == 0x01 {
+				return errors.New("got radio disconnected")
+			}
 		}
 	case 144:
 		if !s.serialAndAudioStreamOpened && bytes.Equal(r[:6], []byte{0x90, 0x00, 0x00, 0x00, 0x00, 0x00}) && r[96] == 1 {