diff --git a/doc/filters.texi b/doc/filters.texi
index 7599646a5e..64878e15da 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -11122,7 +11122,7 @@ will try to use a good random seed on a best effort basis.
 
 @item pal8
 Set pal8 output pixel format. This option does not work with codebook
-length greater than 256.
+length greater than 256. Default is disabled.
 @end table
 
 @section entropy