diff --git a/components/templates/src/lib.rs b/components/templates/src/lib.rs
index 04e7d1da3c..1053b4259d 100644
--- a/components/templates/src/lib.rs
+++ b/components/templates/src/lib.rs
@@ -45,7 +45,7 @@ pub fn render_redirect_template(url: &str, tera: &Tera) -> Result<String> {
 
 pub fn load_tera(path: &Path, config: &Config) -> Result<Tera> {
     let tpl_glob =
-        format!("{}/{}", path.to_string_lossy().replace('\\', "/"), "templates/**/*.{*ml,md}");
+        format!("{}/{}", path.to_string_lossy().replace('\\', "/"), "templates/**/*.{*ml,md,txt}");
 
     // Only parsing as we might be extending templates from themes and that would error
     // as we haven't loaded them yet
diff --git a/docs/content/documentation/templates/robots.md b/docs/content/documentation/templates/robots.md
index c93ff73bbb..98cb4374a8 100644
--- a/docs/content/documentation/templates/robots.md
+++ b/docs/content/documentation/templates/robots.md
@@ -15,3 +15,14 @@ Disallow:
 Allow: /
 Sitemap: {{/* get_url(path="sitemap.xml") */}}
 ```
+
+The file can be extended & expanded like other templates using e.g. Tera's `include` tag:
+
+```jinja2
+User-agent: *
+Disallow:
+Allow: /
+Sitemap: {{/* get_url(path="sitemap.xml") */}}
+
+{% include "path/to/other/robots.txt" %}
+```