diff --git a/.gitmodules b/.gitmodules
index 3886155b07..3d415661de 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -65,5 +65,5 @@
 	url = https://github.com/UAVCAN/libcanard.git
 [submodule "src/drivers/uavcan_v1/legacy_data_types"]
 	path = src/drivers/uavcan_v1/legacy_data_types
-	url = https://github.com/PX4/public_regulated_data_types/
+	url = https://github.com/PX4/public_regulated_data_types.git
 	branch = legacy