diff --git a/.gitmodules b/.gitmodules
index b805414ac..8919cd524 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -101,3 +101,9 @@
 [submodule "submodules/bcmatroska2"]
 	path = submodules/bcmatroska2
 	url = git://git.linphone.org/bcmatroska2.git
+[submodule "submodules/externals/xerces-c"]
+	path = submodules/externals/xerces-c
+	url = git://git.linphone.org/xerces-c.git
+[submodule "submodules/externals/libxsd"]
+	path = submodules/externals/libxsd
+	url = git://git.linphone.org/libxsd
diff --git a/submodules/externals/libxsd b/submodules/externals/libxsd
new file mode 160000
index 000000000..66bfadb5a
--- /dev/null
+++ b/submodules/externals/libxsd
@@ -0,0 +1 @@
+Subproject commit 66bfadb5a91245e3dc39c7e90432c87396139dab
diff --git a/submodules/externals/xerces-c b/submodules/externals/xerces-c
new file mode 160000
index 000000000..ba38ca984
--- /dev/null
+++ b/submodules/externals/xerces-c
@@ -0,0 +1 @@
+Subproject commit ba38ca984ae74e2affb72696b4a8d7925c0ce348