diff --git a/RtspClientSharp/Rtsp/RtspClientInternal.cs b/RtspClientSharp/Rtsp/RtspClientInternal.cs
index ce05c35..d86479e 100644
--- a/RtspClientSharp/Rtsp/RtspClientInternal.cs
+++ b/RtspClientSharp/Rtsp/RtspClientInternal.cs
@@ -226,7 +226,7 @@ private async Task SetupTrackAsync(RtspMediaTrackInfo track, CancellationToken t
             else
             {
                 int channelCounter = _streamsMap.Count;
-                rtpChannelNumber = ++channelCounter;
+                rtpChannelNumber = channelCounter;
                 rtcpChannelNumber = ++channelCounter;
 
                 setupRequest = _requestMessageFactory.CreateSetupTcpInterleavedRequest(track.TrackName,
diff --git a/RtspClientSharp/RtspClientSharp.csproj b/RtspClientSharp/RtspClientSharp.csproj
index aad1d73..e914d9c 100644
--- a/RtspClientSharp/RtspClientSharp.csproj
+++ b/RtspClientSharp/RtspClientSharp.csproj
@@ -18,7 +18,7 @@
 	<RequireLicenseAcceptance>false</RequireLicenseAcceptance>
     <PackageIconUrl>https://github.com/BogdanovKirill/RtspClientSharp/blob/master/Images/package_icon.png?raw=true</PackageIconUrl>
     <Copyright>Copyright ©2018 Kirill Bogdanov</Copyright>
-    <Version>1.2.0</Version>
+    <Version>1.2.1</Version>
     <PackageReleaseNotes>-Small performance optimizations are made
 -H264 parsing speed is increased (avoid constant memory copying when possible)
 -Multi-threaded bugs are fixed