diff --git a/content/index.md b/content/index.md
index 46af0d5..157bdc1 100644
--- a/content/index.md
+++ b/content/index.md
@@ -80,7 +80,7 @@ Stuff I've made!
 ### convert all files in dir to mp3 on windows
 
 ```ps
-gci -file | %{ ffmpeg -i $_.fullname $_.basename.mp3 }
+gci -file | %{ ffmpeg -i $_.fullname $($_.basename).mp3 }
 ```
 
 ## log