diff --git a/src/NzbDrone.Core/Download/Clients/Transmission/TransmissionBase.cs b/src/NzbDrone.Core/Download/Clients/Transmission/TransmissionBase.cs
index 3227e9404..d375c6503 100644
--- a/src/NzbDrone.Core/Download/Clients/Transmission/TransmissionBase.cs
+++ b/src/NzbDrone.Core/Download/Clients/Transmission/TransmissionBase.cs
@@ -211,7 +211,7 @@ namespace NzbDrone.Core.Download.Clients.Transmission
 
         protected virtual OsPath GetOutputPath(OsPath outputPath, TransmissionTorrent torrent)
         {
-            return outputPath + torrent.Name;
+            return outputPath + torrent.Name.Replace(":", "_");
         }
 
         protected string GetDownloadDirectory()