diff --git a/src/Tgstation.Server.Host/Transfer/FileUploadProvider.cs b/src/Tgstation.Server.Host/Transfer/FileUploadProvider.cs
index 31a691b36a..db7965f545 100644
--- a/src/Tgstation.Server.Host/Transfer/FileUploadProvider.cs
+++ b/src/Tgstation.Server.Host/Transfer/FileUploadProvider.cs
@@ -9,8 +9,6 @@ using Tgstation.Server.Api.Models;
 using Tgstation.Server.Api.Models.Response;
 using Tgstation.Server.Host.IO;
 
-#nullable disable
-
 namespace Tgstation.Server.Host.Transfer
 {
 	/// <inheritdoc />
@@ -27,7 +25,7 @@ namespace Tgstation.Server.Host.Transfer
 		/// <summary>
 		/// The <see cref="TaskCompletionSource{TResult}"/> for the <see cref="Stream"/>.
 		/// </summary>
-		readonly TaskCompletionSource<Stream> streamTcs;
+		readonly TaskCompletionSource<Stream?> streamTcs;
 
 		/// <summary>
 		/// The <see cref="TaskCompletionSource"/> that completes in <see cref="IDisposable.Dispose"/> or when <see cref="SetError(ErrorCode, string)"/> is called.
@@ -42,7 +40,7 @@ namespace Tgstation.Server.Host.Transfer
 		/// <summary>
 		/// The <see cref="ErrorMessageResponse"/> that occurred while processing the upload if any.
 		/// </summary>
-		ErrorMessageResponse errorMessage;
+		ErrorMessageResponse? errorMessage;
 
 		/// <summary>
 		/// Initializes a new instance of the <see cref="FileUploadProvider"/> class.
@@ -54,7 +52,7 @@ namespace Tgstation.Server.Host.Transfer
 			Ticket = ticket ?? throw new ArgumentNullException(nameof(ticket));
 
 			ticketExpiryCts = new CancellationTokenSource();
-			streamTcs = new TaskCompletionSource<Stream>();
+			streamTcs = new TaskCompletionSource<Stream?>();
 			completionTcs = new TaskCompletionSource();
 			this.streamKind = streamKind;
 		}
@@ -68,7 +66,7 @@ namespace Tgstation.Server.Host.Transfer
 		}
 
 		/// <inheritdoc />
-		public async ValueTask<Stream> GetResult(CancellationToken cancellationToken)
+		public async ValueTask<Stream?> GetResult(CancellationToken cancellationToken)
 		{
 			using (cancellationToken.Register(() => streamTcs.TrySetCanceled(cancellationToken)))
 			using (ticketExpiryCts.Token.Register(() => streamTcs.TrySetResult(null)))
@@ -90,14 +88,14 @@ namespace Tgstation.Server.Host.Transfer
 		/// <param name="stream">The <see cref="Stream"/> containing uploaded data.</param>
 		/// <param name="cancellationToken">The <see cref="CancellationToken"/> for the operation.</param>
 		/// <returns>A <see cref="Task{TResult}"/> resulting in <see langword="null"/>, <see cref="ErrorMessageResponse"/> otherwise.</returns>
-		public async ValueTask<ErrorMessageResponse> Completion(Stream stream, CancellationToken cancellationToken)
+		public async ValueTask<ErrorMessageResponse?> Completion(Stream stream, CancellationToken cancellationToken)
 		{
 			ArgumentNullException.ThrowIfNull(stream);
 
 			if (ticketExpiryCts.IsCancellationRequested)
 				return new ErrorMessageResponse(ErrorCode.ResourceNotPresent);
 
-			Stream bufferedStream = null;
+			Stream? bufferedStream = null;
 			try
 			{
 				switch (streamKind)