diff --git a/build.sh b/build.sh
index 684fe4a2..84fe5462 100755
--- a/build.sh
+++ b/build.sh
@@ -1,7 +1,7 @@
 #!/bin/bash
 
-if [[ "$TRAVIS_TAG" != null ]]; then
-    echo "This build will be published under the tag ${TRAVIS_TAG}"
+if [ ! -s $TRAVIS_TAG ] ; then
+    echo "This build will be published under the tag: ${TRAVIS_TAG}"
 fi
 
 (cd gateway && ./build.sh)