diff --git a/.gitmodules b/.gitmodules
index c7017b0c..21d2efd9 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -4,3 +4,6 @@
 [submodule "etl"]
 	path = etl
 	url = https://github.com/ETLCPP/etl.git
+[submodule "tmtc"]
+	path = tmtc
+	url = https://git.ksat-stuttgart.de/Robin.Mueller/tmtc.git
diff --git a/tmtc b/tmtc
new file mode 160000
index 00000000..fe31e31d
--- /dev/null
+++ b/tmtc
@@ -0,0 +1 @@
+Subproject commit fe31e31d9f04ab1b3e8c20409da4370f38e35e85