diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..01dd1d0
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "src/cpp/kissfft"]
+	path = src/cpp/kissfft
+	url = git@github.com:mborgerding/kissfft.git
diff --git a/src/cpp/kissfft b/src/cpp/kissfft
new file mode 160000
index 0000000..8f47a67
--- /dev/null
+++ b/src/cpp/kissfft
@@ -0,0 +1 @@
+Subproject commit 8f47a67f595a6641c566087bf5277034be64f24d