diff --git a/SC2039.md b/SC2039.md
index 74e0986..a101bc6 100644
--- a/SC2039.md
+++ b/SC2039.md
@@ -1,4 +1,7 @@
 ## In POSIX sh, *something* is undefined.
+
+*Note: This warning has been retired in favor of individual SC3xxx warnings for each individual issue.*
+
 You have declared that your script works with `/bin/sh`, but you are using features that have undefined behavior according to the POSIX specification. 
 
 It may currently work for you, but it can or will fail on other OS, the same OS with different configurations, from different contexts (like initramfs/chroot), or in different versions of the same OS, including future updates to your current system.