diff --git a/test/unordered/stats_tests.cpp b/test/unordered/stats_tests.cpp
index 09d4bdbe..6f0dec20 100644
--- a/test/unordered/stats_tests.cpp
+++ b/test/unordered/stats_tests.cpp
@@ -183,7 +183,7 @@ template <class Container> void test_stats()
 
   test::random_values<Container> l2(15000, test::sequential);
   std::vector<value_type> v2(l2.begin(), l2.end());
-  std::atomic<int> found = 0, not_found = 0;
+  std::atomic<int> found{0}, not_found{0};
   thread_runner(v2, [&cc, &found, &not_found](boost::span<value_type> sp) {
     for (auto const& x : sp) {
       if(cc.contains(test::get_key<Container>(x))) ++found;