diff --git a/ltsdb_json.py b/ltsdb_json.py
index faa64af..454f6d3 100644
--- a/ltsdb_json.py
+++ b/ltsdb_json.py
@@ -9,6 +9,7 @@ import time
 
 class LTS:
     base_dir = "data"
+    queue_dir = "queue"
     limit = 1000
 
     def __init__(self, description=None, id=None):
@@ -20,6 +21,7 @@ class LTS:
             m.update(bytes(serialized_description, encoding="UTF-8"))
             id = m.hexdigest()
         self.filename = self.base_dir + "/" + id
+        self.id = id
         try:
             with open(self.filename, "r") as fh:
                 fcntl.flock(fh, fcntl.LOCK_SH)
@@ -57,6 +59,8 @@ class LTS:
             fcntl.flock(fh, fcntl.LOCK_EX)
             json.dump({"description": self.description, "data": self.data}, fh)
             fh.truncate()
+        with open(self.queue_dir + "/" + self.id, "w") as fh:
+            pass
 
     def rebuild_index(self):
         t0 = time.time()