diff --git a/.gitmodules b/.gitmodules
index 7b3cf7d314634dc8b1724d5bb87a15b53d3889b6..f1711e9df99ccb3a6feca7dae7f5f1efc79500cf 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -18,3 +18,7 @@
 	path = asn1/LibIts/EVCSN
 	url = ../../LIBS/LibIts.git
 	branch = master
+[submodule "master_asn1/LibIts/IS"]
+	path = asn1/LibIts/IS
+	url = ../../LIBS/LibIts.git
+	branch = master
diff --git a/asn1/LibIts/IS b/asn1/LibIts/IS
new file mode 160000
index 0000000000000000000000000000000000000000..9e41863066543b1e33b7d188a2b3bd3444f310ce
--- /dev/null
+++ b/asn1/LibIts/IS
@@ -0,0 +1 @@
+Subproject commit 9e41863066543b1e33b7d188a2b3bd3444f310ce