diff --git a/README.md b/README.md
index d419755..fdf534c 100644
--- a/README.md
+++ b/README.md
@@ -130,6 +130,13 @@ Because the model reads from standard input, you can a model to it:
 $ cat more/piano-tuners.fermi | fermi
 ```
 
+In that case, you will probably want to use the echo flag as well
+
+```
+
+$ cat more/piano-tuners-commented.fermi | fermi -echo
+```
+
 You can make a model an executable file by running `$ chmod -x model.fermi` and then adding the following at the top!
 
 ```