diff --git a/doc/pacman.conf.5.txt b/doc/pacman.conf.5.txt
index e793e78..ad7fb40 100644
--- a/doc/pacman.conf.5.txt
+++ b/doc/pacman.conf.5.txt
@@ -178,6 +178,11 @@ Options
Performs an approximate check for adequate available disk space before
installing packages.
+*ShowAllOptdeps*::
+ When installing a package, show installed optional dependencies too.
+ Default behavior is to only show uninstalled ones.
+ If turned on, installed optional dependencies will be marked with '[installed]'
+
*VerbosePkgLists*::
Displays name, version and size of target packages formatted
as a table for upgrade, sync and remove operations.
diff --git a/etc/pacman.conf.in b/etc/pacman.conf.in
index b9595ef..73445ac 100644
--- a/etc/pacman.conf.in
+++ b/etc/pacman.conf.in
@@ -35,6 +35,7 @@ Architecture = auto
#TotalDownload
#CheckSpace
#VerbosePkgLists
+#ShowAllOptdeps