diff --git a/ansible_mitogen/affinity.py b/ansible_mitogen/affinity.py
index c8273d6a..d7ae45a6 100644
--- a/ansible_mitogen/affinity.py
+++ b/ansible_mitogen/affinity.py
@@ -211,7 +211,7 @@ class LinuxPolicy(Policy):
 
         self._set_cpu(self._reserve_shift + (
             (n % max(1, (self._cpu_count() - self._reserve_shift)))
-        )
+        ))
 
     def _set_cpu(self, cpu):
         self._set_affinity(1 << cpu)