diff --git a/src/NzbDrone.Core/Update/InstallUpdateService.cs b/src/NzbDrone.Core/Update/InstallUpdateService.cs
index c79e02f2c..3c655cc67 100644
--- a/src/NzbDrone.Core/Update/InstallUpdateService.cs
+++ b/src/NzbDrone.Core/Update/InstallUpdateService.cs
@@ -105,11 +105,12 @@ private bool InstallUpdate(UpdatePackage updatePackage)
                 return false;
             }
 
+            var tempFolder = _appFolderInfo.TempFolder;
             var updateSandboxFolder = _appFolderInfo.GetUpdateSandboxFolder();
 
-            if (_diskProvider.GetTotalSize(updateSandboxFolder) < 1.Gigabytes())
+            if (_diskProvider.GetTotalSize(tempFolder) < 1.Gigabytes())
             {
-                _logger.Warn("Temporary location '{0}' has less than 1 GB free space, Radarr may not be able to update itself.", updateSandboxFolder);
+                _logger.Warn("Temporary location '{0}' has less than 1 GB free space, Radarr may not be able to update itself.", tempFolder);
             }
 
             var packageDestination = Path.Combine(updateSandboxFolder, updatePackage.FileName);