diff --git a/contrib/zmq/zmq_sub.py b/contrib/zmq/zmq_sub.py
index 47087e875b59a..81873feffdd57 100755
--- a/contrib/zmq/zmq_sub.py
+++ b/contrib/zmq/zmq_sub.py
@@ -34,7 +34,7 @@
             print('- HASH BLOCK ('+sequence+') -')
             print(binascii.hexlify(body).decode("utf-8"))
         elif topic == "hashtx":
-            print ('- HASH TX ('+sequence+') -')
+            print('- HASH TX ('+sequence+') -')
             print(binascii.hexlify(body).decode("utf-8"))
         elif topic == "hashtxlock":
             print('- HASH TX LOCK ('+sequence+') -')