diff --git a/SC3007.md b/SC3007.md
index 82d3f35..959c569 100644
--- a/SC3007.md
+++ b/SC3007.md
@@ -1,4 +1,4 @@
-## In POSIX sh, $[..] in place of $((..)) is undefined.
+## In POSIX sh, `$[..]` in place of `$((..))` is undefined.
 
 ### Problematic code: