diff --git a/SC2218.md b/SC2218.md
index efb39e9..8f7213c 100644
--- a/SC2218.md
+++ b/SC2218.md
@@ -29,7 +29,7 @@ Function definitions are much like variable assignments, and define a name at th
 
 This is especially apparent when defining functions conditionally:
 
-```
+```sh
 case "$(uname -s)" in
   Linux) hi() { echo "Hello from Linux"; } ;;
   Darwin) hi() { echo "Hello from macOS"; } ;;