diff --git a/SC3039.md b/SC3039.md
index 1a05d4b..b6ce3e0 100644
--- a/SC3039.md
+++ b/SC3039.md
@@ -1,4 +1,4 @@
-## In POSIX sh, 'let' is undefined.
+## In POSIX sh, `let` is undefined.
 
 (or "In dash, ... is not supported." when using `dash`)