diff --git a/content/en/functions/strings.FirstUpper.md b/content/en/functions/strings.FirstUpper.md
index 7571f3c9d..1cb38386c 100644
--- a/content/en/functions/strings.FirstUpper.md
+++ b/content/en/functions/strings.FirstUpper.md
@@ -16,4 +16,6 @@ signature:
   - strings.FirstUpper STRING
 ---
 
+```go-html-template
 {{ strings.FirstUpper "foo" }} → "Foo"
+```