diff --git a/libraries/GCS_MAVLink/sync b/libraries/GCS_MAVLink/sync
index 1d94af457c..a0d2d92a45 100755
--- a/libraries/GCS_MAVLink/sync
+++ b/libraries/GCS_MAVLink/sync
@@ -5,7 +5,7 @@ branch="roi"
 # to master then
 trap exit ERR
 rm -rf _tmp
-git clone git://github.com/pixhawk/mavlink.git -b roi _tmp
+git clone git://github.com/pixhawk/mavlink.git -b $branch _tmp
 rm -rf _tmp/.git
 rsync -av _tmp/* .
 rm -rf _tmp