diff --git a/travis/build-wheels.sh b/travis/build-wheels.sh
index 3c217140c833ce15b994843518d26fef0029d245..6ceb2eefc203b2a8012f937115f99ef221434fe5 100755
--- a/travis/build-wheels.sh
+++ b/travis/build-wheels.sh
@@ -54,6 +54,7 @@ done
 /opt/python/cp37-cp37m/bin/python /io/travis/fix-wheel.py /deps/ocl-icd/COPYING
 
 if [[ "${TWINE_USERNAME}" == "" ]]; then
+    echo "TWINE_USERNAME not set. Skipping uploading wheels"
     exit 0
 fi