diff --git a/.gitmodules b/.gitmodules
index ddf8aaa382..6bf0c6b3bd 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,6 +1,7 @@
 [submodule "dsdl"]
 	path = dsdl
 	url = https://github.com/UAVCAN/dsdl
+	branch = legacy-v0
 [submodule "libuavcan/dsdl_compiler/pyuavcan"]
 	path = libuavcan/dsdl_compiler/pyuavcan
 	url = https://github.com/UAVCAN/pyuavcan