diff --git a/templates/java/maven/maven-build.gitlab-ci.yml b/templates/java/maven/maven-build.gitlab-ci.yml
index 8887e24..9cc43a2 100644
--- a/templates/java/maven/maven-build.gitlab-ci.yml
+++ b/templates/java/maven/maven-build.gitlab-ci.yml
@@ -3,7 +3,7 @@
   image: $MAVEN_IMAGE
   before_script:
     - >
-      if [ "$CI_COMMIT_TAG" != "" ]; then
+      if [ ! -z "$CI_COMMIT_TAG" ]; then
         mvn $MVN_EXTRA_ARGS $MAVEN_CLI_OPTS versions:set -DnewVersion=$CI_COMMIT_TAG -DgenerateBackupPoms=false
       fi
   script: