diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 0d96d31cb..030b62488 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -89,7 +89,7 @@ setup:containers:frontend:
     - IMAGE_EXISTS=`curl "${CI_API_V4_URL}/projects/${CI_PROJECT_ID}/registry/repositories?tags=true" | grep \""${REGISTRY_DESTINATION}"\"`
     - ${FORCE_REBUILD_IMAGE} && echo "Force rebuilding container."
     - >
-      if [[ ${IMAGE_EXISTS} -a ! ${FORCE_REBUILD_IMAGE} ]]; then
+      if [[ ${IMAGE_EXISTS} && ! ${FORCE_REBUILD_IMAGE} ]]; then
         echo "Image ${IMAGE_TAG} already exists in the container registry. Skipping build."
       else
         echo "Building image..."