diff --git a/src/communicator/daemoneventhooks/__init__.py b/src/communicator/daemoneventhooks/__init__.py
index f7bec957..f018c276 100644
--- a/src/communicator/daemoneventhooks/__init__.py
+++ b/src/communicator/daemoneventhooks/__init__.py
@@ -57,6 +57,8 @@ def daemon_event_handlers(shared_state: 'TooMany'):
     def upload_event(block: 'BlockHash' = ''):
         if not block:
             raise ValueError
+        if not comm_inst.onlinePeers:
+            return
         public_api.hideBlocks.append(block)
         try:
             mixmate.block_mixer(comm_inst.blocksToUpload, block)