diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 000000000..23bd18f65
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "simdzone"]
+	path = simdzone
+	url = https://github.com/NLnetLabs/simdzone.git
diff --git a/simdzone b/simdzone
new file mode 160000
index 000000000..68a63488f
--- /dev/null
+++ b/simdzone
@@ -0,0 +1 @@
+Subproject commit 68a63488f4a49fe1c4862665b18797f2a620126f