diff --git a/README.md b/README.md
index a54ff273..182a06ae 100644
--- a/README.md
+++ b/README.md
@@ -508,6 +508,9 @@ $ bb "(my-gist-script/-main)"
 Hello from gist script!
 ```
 
+When invoking `bb` with a main function the expression `(System/getProperty
+"babashka.main")` will return the name of the main function.
+
 Also see the
 [babashka.classpath](https://github.com/borkdude/babashka/#babashkaclasspath)
 namespace which allows dynamically adding to the classpath.