diff --git a/SC3043.md b/SC3043.md
index 6882915..498baad 100644
--- a/SC3043.md
+++ b/SC3043.md
@@ -22,7 +22,7 @@ myfunc() {
 
 ### Rationale:
 
-`local` is supported in many shells, including bash, ksh, dash, and BusyBox ash. However, strictly speaking, it's not POSIX.
+`local` is supported in many shells, including bash, ksh, dash, and BusyBox ash. However, strictly speaking, it's not POSIX ([rationale](https://austingroupbugs.net/view.php?id=767)).
 
 ### Exceptions: