diff --git a/Emby.Server.Implementations/LiveTv/EmbyTV/EmbyTV.cs b/Emby.Server.Implementations/LiveTv/EmbyTV/EmbyTV.cs
index aaf74b5c68..81a6b8508c 100644
--- a/Emby.Server.Implementations/LiveTv/EmbyTV/EmbyTV.cs
+++ b/Emby.Server.Implementations/LiveTv/EmbyTV/EmbyTV.cs
@@ -992,6 +992,11 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
 
         public async Task<List<MediaSourceInfo>> GetChannelStreamMediaSources(string channelId, CancellationToken cancellationToken)
         {
+            if (string.IsNullOrWhiteSpace(channelId))
+            {
+                throw new ArgumentNullException("channelId");
+            }
+
             foreach (var hostInstance in _liveTvManager.TunerHosts)
             {
                 try
diff --git a/Emby.Server.Implementations/LiveTv/TunerHosts/BaseTunerHost.cs b/Emby.Server.Implementations/LiveTv/TunerHosts/BaseTunerHost.cs
index ad43a611b8..5fae3f666b 100644
--- a/Emby.Server.Implementations/LiveTv/TunerHosts/BaseTunerHost.cs
+++ b/Emby.Server.Implementations/LiveTv/TunerHosts/BaseTunerHost.cs
@@ -101,6 +101,11 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts
 
         public async Task<List<MediaSourceInfo>> GetChannelStreamMediaSources(string channelId, CancellationToken cancellationToken)
         {
+            if (string.IsNullOrWhiteSpace(channelId))
+            {
+                throw new ArgumentNullException("channelId");
+            }
+
             if (IsValidChannelId(channelId))
             {
                 var hosts = GetTunerHosts();
@@ -161,6 +166,11 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts
 
         public async Task<LiveStream> GetChannelStream(string channelId, string streamId, CancellationToken cancellationToken)
         {
+            if (string.IsNullOrWhiteSpace(channelId))
+            {
+                throw new ArgumentNullException("channelId");
+            }
+
             if (!IsValidChannelId(channelId))
             {
                 throw new FileNotFoundException();
diff --git a/Emby.Server.Implementations/LiveTv/TunerHosts/M3UTunerHost.cs b/Emby.Server.Implementations/LiveTv/TunerHosts/M3UTunerHost.cs
index 756c3377c6..19454abbc0 100644
--- a/Emby.Server.Implementations/LiveTv/TunerHosts/M3UTunerHost.cs
+++ b/Emby.Server.Implementations/LiveTv/TunerHosts/M3UTunerHost.cs
@@ -87,6 +87,11 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts
 
         protected override bool IsValidChannelId(string channelId)
         {
+            if (string.IsNullOrWhiteSpace(channelId))
+            {
+                throw new ArgumentNullException("channelId");
+            }
+
             return channelId.StartsWith(ChannelIdPrefix, StringComparison.OrdinalIgnoreCase);
         }