diff --git a/src/main/scala/li/cil/oc/server/component/FileSystem.scala b/src/main/scala/li/cil/oc/server/component/FileSystem.scala
index 8211e7f1e..c496625a9 100644
--- a/src/main/scala/li/cil/oc/server/component/FileSystem.scala
+++ b/src/main/scala/li/cil/oc/server/component/FileSystem.scala
@@ -246,6 +246,11 @@ class FileSystem(val fileSystem: IFileSystem, var label: Label, val host: Option
   def checkHandle(args: Arguments, index: Int) = {
     if (args.isInteger(index)) {
       args.checkInteger(index)
+    } else if (args.isTable(index)) {
+      args.checkTable(index).get("handle") match {
+        case handle: Number => handle.intValue()
+        case _ => throw new IOException("bad file descriptor")
+      }
     } else args.checkAny(index) match {
       case handle: HandleValue => handle.handle
       case _ => throw new IOException("bad file descriptor")