diff --git a/tddb/td/db/TQueue.cpp b/tddb/td/db/TQueue.cpp
index 7b5e24360..c3c593628 100644
--- a/tddb/td/db/TQueue.cpp
+++ b/tddb/td/db/TQueue.cpp
@@ -233,7 +233,7 @@ class TQueueImpl : public TQueue {
           }
         }
       }
-      if (deleted_events == it->second.events.size()) {
+      if (callback_ != nullptr && deleted_events == it->second.events.size()) {
         deleted_queues++;
         it = queues_.erase(it);
       } else {