diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 00000000..6b43ded8
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "src/ament_cmake"]
+	path = src/ament_cmake
+	url = https://github.com/PickNikRobotics/ament_cmake.git
diff --git a/src/ament_cmake b/src/ament_cmake
new file mode 160000
index 00000000..08de9432
--- /dev/null
+++ b/src/ament_cmake
@@ -0,0 +1 @@
+Subproject commit 08de9432ab83f96840fa1af4791f2d227bf62007