diff --git a/src/Tgstation.Server.Host/System/SystemDManager.cs b/src/Tgstation.Server.Host/System/SystemDManager.cs
index 4e3b86972c..7b0542fcad 100644
--- a/src/Tgstation.Server.Host/System/SystemDManager.cs
+++ b/src/Tgstation.Server.Host/System/SystemDManager.cs
@@ -11,8 +11,6 @@ using Mono.Unix;
 using Tgstation.Server.Host.Components;
 using Tgstation.Server.Host.Core;
 
-#nullable disable
-
 namespace Tgstation.Server.Host.System
 {
 	/// <summary>
@@ -88,7 +86,7 @@ namespace Tgstation.Server.Host.System
 		}
 
 		/// <inheritdoc />
-		public ValueTask HandleRestart(Version updateVersion, bool handlerMayDelayShutdownWithExtremelyLongRunningTasks, CancellationToken cancellationToken)
+		public ValueTask HandleRestart(Version? updateVersion, bool handlerMayDelayShutdownWithExtremelyLongRunningTasks, CancellationToken cancellationToken)
 		{
 			// If this is set, we know a gracefule SHUTDOWN was requested
 			restartInProgress = !handlerMayDelayShutdownWithExtremelyLongRunningTasks;