diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..66f8189
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "wars/WASI"]
+	path = wars/WASI
+	url = https://github.com/wasix-org/wasix-witx.git
diff --git a/wars/WASI b/wars/WASI
new file mode 160000
index 0000000..ad9d3c9
--- /dev/null
+++ b/wars/WASI
@@ -0,0 +1 @@
+Subproject commit ad9d3c9a2fa6ef13cde11466b7e3f93ba1293c49