diff --git a/README.md b/README.md
index f8bc75b..2d69aaf 100644
--- a/README.md
+++ b/README.md
@@ -46,7 +46,7 @@ The `gen.py` script can be used to generate `uf5x7.png`, the full image of the
 font. You will need Python 3 and Pillow (PIL might be okay).
 
 ```sh
-% ./gen.py blocks/*
+% ./gen.py uf5x7/*
 ```
 
 It will read each block's position from its file name (which should be on the