diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000000000000000000000000000000000000..654aa10bb8379a69c3bb7a85d8b581dd638b6058
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,4 @@
+[submodule "src/vrpn"]
+	path = src/vrpn
+	url = https://github.com/vrpn/vrpn
+	branch = v07.33
diff --git a/src/vrpn b/src/vrpn
new file mode 160000
index 0000000000000000000000000000000000000000..99c54dbefe04897cc7c146101a126f62c0e65f97
--- /dev/null
+++ b/src/vrpn
@@ -0,0 +1 @@
+Subproject commit 99c54dbefe04897cc7c146101a126f62c0e65f97