diff --git a/.gitmodules b/.gitmodules
index 0b2f93971..4034090f8 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -43,3 +43,6 @@
 [submodule "submodules/bctoolbox"]
 	path = submodules/bctoolbox
 	url = git://git.linphone.org/bctoolbox.git
+[submodule "submodules/externals/mbedtls"]
+	path = submodules/externals/mbedtls
+	url = git://git.linphone.org/mbedtls.git
diff --git a/submodules/externals/mbedtls b/submodules/externals/mbedtls
new file mode 160000
index 000000000..3b88f2749
--- /dev/null
+++ b/submodules/externals/mbedtls
@@ -0,0 +1 @@
+Subproject commit 3b88f2749d59e5346de08e121fba1d797c55ddaa