diff --git a/.travis.yml b/.travis.yml
index dce15b7ab16851..9fa6d5d55252a7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,7 +11,7 @@ matrix:
       script:
         - make lint
         # Lint the first commit in the PR.
-        - \[ "${TRAVIS_PULL_REQUEST}" != "false" \] && PR_ID=${TRAVIS_PULL_REQUEST}; bash tools/lint-pr-commit-message.sh ${PR_ID}
+        - \[ "${TRAVIS_PULL_REQUEST}" != "false" \] && bash tools/lint-pr-commit-message.sh ${TRAVIS_PULL_REQUEST}
     - name: "Test Suite"
       addons:
         apt: