diff --git a/SC2055.md b/SC2055.md
index 5f455aa..a1a5490 100644
--- a/SC2055.md
+++ b/SC2055.md
@@ -41,7 +41,7 @@ This statement is identical to `! [[ $1 = foo || $1 = bar ]]`, which also works
 Rare.
 
 * If I want to check that $FOO, $BAR and $COW are all equal:
-```
+```sh
 if [[ $FOO != $BAR || $FOO != $COW ]]
 then
     echo "$FOO and $BAR and $COW are not all equal"