diff --git a/README.md b/README.md
index 3e4b3c3..0e62a41 100644
--- a/README.md
+++ b/README.md
@@ -46,6 +46,12 @@ Just add a dependency on your metadata.json file, for example:
 ],
 ```
 
+in ERB files you can call this function using:
+
+```erb
+<%= scope.function_bool2onoff([@trace]) %>
+```
+
 ## Reference
 
 ### functions