diff --git a/system/zopfli/slack-desc b/system/zopfli/slack-desc
index 5c957bb4a7..6e60056054 100644
--- a/system/zopfli/slack-desc
+++ b/system/zopfli/slack-desc
@@ -5,7 +5,7 @@
 # You must make exactly 11 lines for the formatting to be correct.  It's also
 # customary to leave one space after the ':' except on otherwise blank lines.
 
-       |-----handy-ruler------------------------------------------------------|
+      |-----handy-ruler------------------------------------------------------|
 zopfli: zopfli (compression algorithm)
 zopfli:
 zopfli: Zopfli is a compression library programmed in C to perform