diff --git a/README.md b/README.md
index 17bb37b2..4d03a6d3 100644
--- a/README.md
+++ b/README.md
@@ -177,7 +177,7 @@ To generate the TOC (Table of Contents), a little bash script from a
 Given this is in PATH as `md-toc`, use:
 
 ```shell
-md-toc <README.txt 2 4 | cut -c5-'
+md-toc <README.md 2 4 | cut -c5-'
 ```
 
 To render the Markdown files, especially to watch embedded PlantUML diagrams, you can use one of the following methods: