diff --git a/vdirsyncer/__init__.py b/vdirsyncer/__init__.py
index 236f9e9..f6ff806 100644
--- a/vdirsyncer/__init__.py
+++ b/vdirsyncer/__init__.py
@@ -21,7 +21,7 @@ except ImportError:  # pragma: no cover
 
 def _check_python_version():  # pragma: no cover
     import sys
-    if sys.version_info[0] < (3, 3):
+    if sys.version_info < (3, 3, 0):
         print('vdirsyncer requires at least Python 3.3.')
         sys.exit(1)