diff --git a/modules/caddyhttp/templates/templates.go b/modules/caddyhttp/templates/templates.go
index 40e5bbeb1..29d165070 100644
--- a/modules/caddyhttp/templates/templates.go
+++ b/modules/caddyhttp/templates/templates.go
@@ -189,6 +189,14 @@ func init() {
 // {{.RespHeader.Set "Field-Name" "val"}}
 // ```
 //
+// ##### `httpError`
+//
+// Returns an error with the given status code to the HTTP handler chain.
+//
+// ```
+// {{if not (fileExists $includedFile)}}{{httpError 404}}{{end}}
+// ```
+//
 // ##### `splitFrontMatter`
 //
 // Splits front matter out from the body. Front matter is metadata that appears at the very beginning of a file or string. Front matter can be in YAML, TOML, or JSON formats: