diff --git a/FFMpegCore/FFMpeg/FFMpegArgumentProcessor.cs b/FFMpegCore/FFMpeg/FFMpegArgumentProcessor.cs
index d044e5b..423f881 100644
--- a/FFMpegCore/FFMpeg/FFMpegArgumentProcessor.cs
+++ b/FFMpegCore/FFMpeg/FFMpegArgumentProcessor.cs
@@ -141,7 +141,7 @@ private async Task<IProcessResult> Process(ProcessArguments processArguments, Ca
 
             _ffMpegArguments.Pre();
 
-            using var instance = (ProcessInstance)processArguments.Start();
+            using var instance = processArguments.Start();
             var cancelled = false;
             void OnCancelEvent(object sender, int timeout)
             {