diff --git a/.gitmodules b/.gitmodules
index 2539be2..e83f572 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -19,3 +19,6 @@
 [submodule "custom/xelb"]
 	path = custom/xelb
 	url = https://github.com/ch11ng/xelb
+[submodule "custom/org-fstree"]
+	path = custom/org-fstree
+	url = http://repo.or.cz/org-fstree.git
diff --git a/custom/org-fstree b/custom/org-fstree
new file mode 160000
index 0000000..24e305c
--- /dev/null
+++ b/custom/org-fstree
@@ -0,0 +1 @@
+Subproject commit 24e305c6443be9f45198185772eecfddc390a9ce