diff --git a/contrib/zmq/zmq_sub.py b/contrib/zmq/zmq_sub.py
--- a/contrib/zmq/zmq_sub.py
+++ b/contrib/zmq/zmq_sub.py
@@ -31,8 +31,8 @@
 import struct
 import sys
 
-if not (sys.version_info.major >= 3 and sys.version_info.minor >= 5):
-    print("This example only works with Python 3.5 and greater")
+if (sys.version_info.major, sys.version_info.minor) < (3, 6):
+    print("This example only works with Python 3.6 and greater")
     sys.exit(1)
 
 port = 28332