diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 000000000..fca37f5ac
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "simulation/libsimulator"]
+	path = simulation/libsimulator
+	url = https://github.com/arvidn/libsimulator.git