diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..d39232a
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "sitzprobe"]
+	path = sitzprobe
+	url = https://github.com/niftynei/sitzprobe
diff --git a/sitzprobe b/sitzprobe
new file mode 160000
index 0000000..84347d5
--- /dev/null
+++ b/sitzprobe
@@ -0,0 +1 @@
+Subproject commit 84347d551934a1072b65c0dc04c9554db2a97884