diff --git a/onionr/communicator.py b/onionr/communicator.py
index c70afc0f..70c4569b 100755
--- a/onionr/communicator.py
+++ b/onionr/communicator.py
@@ -680,7 +680,7 @@ class OnionrCommunicate:
             return False
         dataLen = len(blockContent)
         print(blockContent)
-        expectedHash = self._crypto.blake2bHash(base64.b64decode(metadata['powToken']) + blockContent.encode())
+        expectedHash = self._crypto.blake2bHash(base64.b64decode(metadata['powToken']) + self._crypto.blake2bHash(blockContent.encode()))
         difficulty = 0
         try:
             expectedHash = expectedHash.decode()