@@ -13,8 +13,13 @@ before_script:

   - sudo apt-get update -qq

   - sudo apt-get install -qq python-yaml

   - git remote add upstream git://github.com/dotcloud/docker.git

-  - git fetch --append --no-tags upstream refs/heads/master:refs/remotes/upstream/master

+  - upstream=master;

+    if [ "$TRAVIS_PULL_REQUEST" != false ]; then

+      upstream=$TRAVIS_BRANCH;

+    fi;

+    git fetch --append --no-tags upstream refs/heads/$upstream:refs/remotes/upstream/$upstream

 # sometimes we have upstream master already as origin/master (PRs), but other times we don't, so let's just make sure we have a completely unambiguous way to specify "upstream master" from here out

+# but if it's a PR against non-master, we need that upstream branch instead :)

 script:

   - hack/travis/dco.py

@@ -6,7 +6,7 @@ if 'TRAVIS' not in os.environ:

 	exit(127)

 if os.environ['TRAVIS_PULL_REQUEST'] != 'false':

-	commit_range = [os.environ['TRAVIS_BRANCH'], 'FETCH_HEAD']

+	commit_range = ['upstream/' + os.environ['TRAVIS_BRANCH'], 'FETCH_HEAD']

 else:

 	try:

 		subprocess.check_call([