diff --git a/.gitmodules b/.gitmodules
index e69de29b..ca0a9754 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -0,0 +1,4 @@
+[submodule "external/tllist"]
+	path = external/tllist
+	url = https://codeberg.org/dnkl/tllist.git
+	branch = master
diff --git a/external/tllist b/external/tllist
new file mode 160000
index 00000000..d61be2b6
--- /dev/null
+++ b/external/tllist
@@ -0,0 +1 @@
+Subproject commit d61be2b6238617d9bfd80aeb1ba0cef13d3a6aba