diff --git a/tests/test_windows_node_source.py b/tests/test_windows_node_source.py
index 062af4b..fac19a4 100644
--- a/tests/test_windows_node_source.py
+++ b/tests/test_windows_node_source.py
@@ -371,6 +371,8 @@ class WindowsNodeSourceTests(unittest.TestCase):
         self.assertNotIn("IsValidOriginRequest", inbox)
         self.assertNotIn("IsValidPlot", inbox)
         self.assertIn('root.TryGetProperty("input_transfers"', inbox)
+        self.assertIn("transfers.GetArrayLength() > 16", inbox)
+        self.assertNotIn("transfers.GetArrayLength() is < 1 or > 16", inbox)
         self.assertIn('"input", key, filename', inbox)
         self.assertIn("FileOptions.WriteThrough", inbox)
         self.assertIn("stream.Flush(flushToDisk: true)", inbox)
diff --git a/windows-node/Zcbot.WindowsNode/JobInboxStore.cs b/windows-node/Zcbot.WindowsNode/JobInboxStore.cs
index 02d639f..539bfac 100644
--- a/windows-node/Zcbot.WindowsNode/JobInboxStore.cs
+++ b/windows-node/Zcbot.WindowsNode/JobInboxStore.cs
@@ -457,7 +457,7 @@ internal sealed class JobInboxStore(string jobsDirectory)
     private static bool IsValidInputTransfers(JsonElement transfers, Guid jobId)
     {
         if (transfers.ValueKind != JsonValueKind.Array
-            || transfers.GetArrayLength() is < 1 or > 16)
+            || transfers.GetArrayLength() > 16)
         {
             return false;
         }