diff --git a/include/thread_pool.h b/include/thread_pool.h
index 58d4b8c..5139a91 100644
--- a/include/thread_pool.h
+++ b/include/thread_pool.h
@@ -64,7 +64,7 @@ private:
 
     std::mutex queueMutex_;
     std::condition_variable condition_;
-    bool running_;
+    bool running_{ false };
     size_t threadCount_;
 };