diff --git a/tools/travis-ci/run.sh b/tools/travis-ci/run.sh
index 2357cff1..ceaa14d0 100755
--- a/tools/travis-ci/run.sh
+++ b/tools/travis-ci/run.sh
@@ -272,10 +272,10 @@ New/unknown test failure found!!!
 	fi
 fi
 
-echo "OPJ_CI_DEPLOY: ${OPJ_CI_DEPLOY}"
-echo "TRAVIS_TAG: ${TRAVIS_TAG}"
-echo "APPVEYOR_REPO_TAG: ${APPVEYOR_REPO_TAG}"
-echo "APPVEYOR_REPO_TAG_NAME: ${APPVEYOR_REPO_TAG_NAME}"
+echo "OPJ_CI_DEPLOY: ${OPJ_CI_DEPLOY:-}"
+echo "TRAVIS_TAG: ${TRAVIS_TAG:-}"
+echo "APPVEYOR_REPO_TAG: ${APPVEYOR_REPO_TAG:-}"
+echo "APPVEYOR_REPO_TAG_NAME: ${APPVEYOR_REPO_TAG_NAME:-}"
 if [ "${OPJ_CI_DEPLOY:-}" == "1" ]; then
 	if [ "${TRAVIS_TAG:-}" != "" ]; then
 		cpack -G ZIP -P "OpenJPEG-${TRAVIS_TAG}-${OPJ_BUILDNAME_TEST}.zip"