diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..c162300
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "bzip2"]
+	path = bzip2
+	url = ../bzip2.git
diff --git a/bzip2 b/bzip2
new file mode 160000
index 0000000..5801940
--- /dev/null
+++ b/bzip2
@@ -0,0 +1 @@
+Subproject commit 5801940e0e20c7a54c9cc304408bb4be5deedf7a