diff --git a/TracyVulkan.hpp b/TracyVulkan.hpp
index 0858b7bd..09c50ab8 100644
--- a/TracyVulkan.hpp
+++ b/TracyVulkan.hpp
@@ -173,6 +173,7 @@ private:
 
 extern VkCtxWrapper s_vkCtx;
 
+// TODO: not thread safe!
 class VkCtxScope
 {
 public: