diff --git a/ci/lib.sh b/ci/lib.sh
index 584abcd529bfa5..e1858ae6099d7b 100755
--- a/ci/lib.sh
+++ b/ci/lib.sh
@@ -3,7 +3,7 @@
 if test true = "$TRAVIS"
 then
 	# We are running within Travis CI
-	CI_BRANCH="$TRAVIS_BRANCH"
+	CI_BRANCH="${TRAVIS_PULL_REQUEST_BRANCH:-$TRAVIS_BRANCH}"
 	CI_COMMIT="$TRAVIS_COMMIT"
 	CI_JOB_ID="$TRAVIS_JOB_ID"
 	CI_JOB_NUMBER="$TRAVIS_JOB_NUMBER"