diff --git a/artiq/monkey_patches.py b/artiq/monkey_patches.py
index c937c73fb..715453931 100644
--- a/artiq/monkey_patches.py
+++ b/artiq/monkey_patches.py
@@ -4,7 +4,7 @@ import sys
 __all__ = []
 
 
-if sys.version_info[:2] >= (3, 5, 2):
+if sys.version_info[:3] >= (3, 5, 2):
     import asyncio
 
     # See https://github.com/m-labs/artiq/issues/506