diff --git a/Documentation/config.txt b/Documentation/config.txt
index d8b6cc9654e24c6644986d60ca40eb6d264e6ca8..1932e9b9a2be5437dd467f91472318a5bf1bb992 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -1340,6 +1340,10 @@ gui.diffcontext::
 	Specifies how many context lines should be used in calls to diff
 	made by the linkgit:git-gui[1]. The default is "5".
 
+gui.displayuntracked::
+	Determines if linkgit::git-gui[1] shows untracked files
+	in the file list. The default is "true".
+
 gui.encoding::
 	Specifies the default encoding to use for displaying of
 	file contents in linkgit:git-gui[1] and linkgit:gitk[1].