diff --git a/README.md b/README.md
index e9a2726d..17255055 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,7 @@ running any other commands:
 Creating HTML documentation:
 
     cd htmlgen
-    python3 htmlgen
+    python3 htmlgen.py
 
 (Re-)creating parts of the database, for example LUT init bits: