diff --git a/src/attributes/codegen.md b/src/attributes/codegen.md
index d3ecf00b88..bc0dc31bb2 100644
--- a/src/attributes/codegen.md
+++ b/src/attributes/codegen.md
@@ -715,6 +715,7 @@ Feature                                | Implicitly Enables                    |
 `miscellaneous-extensions-2`           |                                       | miscellaneous extensions 2
 `miscellaneous-extensions-3`           |                                       | miscellaneous extensions 3
 `miscellaneous-extensions-4`           |                                       | miscellaneous extensions 4
+`backchain`                            |                                       | store the caller's frame address in the callee's stack frame backchain slot
 
 [z/Architecture Principles of Operation]: https://publibfp.dhe.ibm.com/epubs/pdf/a227832d.pdf