diff --git a/test/lockperf.py b/test/lockperf.py
index dddd019e2dbdfae3c98d08ee96c3cf8a6de74803..5128c332c6e100d823836e5753379d50530444c0 100755
--- a/test/lockperf.py
+++ b/test/lockperf.py
@@ -59,7 +59,7 @@ class State:
     """Initializes this class.
 
     """
-    self.verify = [False for _ in range(thread_count)]
+    self.verify = [0 for _ in range(thread_count)]
     self.counts = [0 for _ in range(thread_count)]
     self.total_count = 0