diff --git a/src/main.zig b/src/main.zig
index 25489c6..2162eca 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -171,6 +171,9 @@ pub fn main() !void {
 
         render(dev.dev, dev.vkd, sc.ref, frame, dev.queue) catch |err| switch (err) {
             error.OutOfDateKHR => {
+                // TODO: this is a hack to safely destroy sync primitives
+                //  don't do this. be smart about sync primitive reuse or
+                //  move them to "garbage" to be destroyed later.
                 try dev.vkd.deviceWaitIdle(dev.dev);
 
                 try sc.init();