diff --git a/cmuratori/hero/code/code437.hmml b/cmuratori/hero/code/code437.hmml
index 0107e8a..cee326b 100644
--- a/cmuratori/hero/code/code437.hmml
+++ b/cmuratori/hero/code/code437.hmml
@@ -61,7 +61,7 @@
 [2:00:16][@vkar2][Q: I played with the spiral, and had problems with the angular falloff][:statistics]
 [2:00:43][@30ygamer][Q: First timer here. From what I saw it looks like organizational-wise a lot of things are bundled together in your code. How do you handle organizing a lot of code in general? Is it a C / C++ thing to have so many things together? I'm just kinda used to having small pieces of code]
 [2:02:38][@gorevojd][Q: [@cmuratori Casey], I just want to say you thank you for everything. I started to watch you in 2014, when I graduated from university. You taught me more than all of my teachers there. I love game development and I love programming all because of you. Just thank you]
-[2:03:09][@esert][Q: Did you find an answer to your questions in [ref
+[2:03:09][@esert][Q: Did you find an answer to your questions in 'Are Register Names Still Useful?'?[ref
     site="Casey Muratori's home page"
     page="Are Register Names Still Useful?"
     url=https://caseymuratori.com/blog_0028]]