diff --git a/README.adoc b/README.adoc
index 45c69a0..c6eb9f1 100644
--- a/README.adoc
+++ b/README.adoc
@@ -91,6 +91,8 @@ bar 16 255 ul
 cwd bold
 input
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+Filename colors are taken from the `LS_COLORS` environment variable.
+Run 'dircolors' to get some defaults.
 
 Similar software
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