diff --git a/SC2039.md b/SC2039.md
index e31cea9..3a84eaa 100644
--- a/SC2039.md
+++ b/SC2039.md
@@ -251,6 +251,21 @@ command > file 2>&1 or command 2>&1 | othercommand
 
 No Comments / Exceptions
 
+### Heredoc
+
+Change:
+```
+sed 's/some_replacement//g' <<< "${var}"
+```
+
+To:
+```
+printf '%s' "${var}" | sed 's/some_replacement//g'
+```
+
+No Comments / Exceptions
+
+
 ## Exception
 
 Depends on what your expected POSIX shell providers would use.
\ No newline at end of file