diff --git a/Register-Filters-Tags.md b/Register-Filters-Tags.md
index e0999e8..adc120c 100644
--- a/Register-Filters-Tags.md
+++ b/Register-Filters-Tags.md
@@ -1,7 +1,7 @@
 ## Register Filters
 
 ```javascript
-// Usage: {{ name | uppper }}
+// Usage: {{ name | upper }}
 engine.registerFilter('upper', v => v.toUpperCase())
 ```