diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..b7be6f3
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "modified-libfdf"]
+	path = modified-libfdf
+	url = https://github.com/neelravi/libfdf.git
diff --git a/modified-libfdf b/modified-libfdf
new file mode 160000
index 0000000..08f01b2
--- /dev/null
+++ b/modified-libfdf
@@ -0,0 +1 @@
+Subproject commit 08f01b239904bf7c855df1c470e778286c6ddd39