diff --git a/include/spdlog/details/registry.h b/include/spdlog/details/registry.h
index 0b744795..3fd64930 100644
--- a/include/spdlog/details/registry.h
+++ b/include/spdlog/details/registry.h
@@ -146,7 +146,7 @@ public:
 
     static std::shared_ptr<registry_t<Mutex>> instance()
     {
-        if(!_instance)
+        if(_instance == nullptr)
             _instance = std::make_shared<registry_t<Mutex>>();
         return _instance;
     }