diff --git a/src/openrct2/core/JobPool.hpp b/src/openrct2/core/JobPool.hpp
index 12a1f1ad85..af1a1a6ff9 100644
--- a/src/openrct2/core/JobPool.hpp
+++ b/src/openrct2/core/JobPool.hpp
@@ -40,8 +40,8 @@ private:
         }
     };
 
-    std::atomic_bool _shouldStop;
-    std::atomic<size_t> _processing;
+    std::atomic_bool _shouldStop = { false };
+    std::atomic<size_t> _processing = { 0 };
     std::vector<std::thread> _threads;
     std::deque<TaskData> _pending;
     std::deque<TaskData> _completed;