diff --git a/doc/btrbk.conf.5.asciidoc b/doc/btrbk.conf.5.asciidoc
index 74f3f7d..79ee45a 100644
--- a/doc/btrbk.conf.5.asciidoc
+++ b/doc/btrbk.conf.5.asciidoc
@@ -415,8 +415,8 @@ If you want to set this option for regular (non-root) user only, set
     can set *compat_local* or *compat_remote*
     (e.g. "compat_remote busybox").
 
-*cache_dir* <file>|no _*experimental*_::
-    If set, cache extent maps for the 'extents-diff' command.
+*cache_dir* <directory>::
+    If set, cache extent maps for the "btrbk extents" command.
 
 === Btrfs Specific Options