diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 8184fa5e7ee94ff5a3d45e4ac1c8132e99349bcf..b64a4ba35706f443ed0d27ee4355f445f3a5fdda 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -112,7 +112,7 @@ workflow:
         docker tag "${latest_image_name}" "usgs/${CI_PROJECT_NAME}:${ENVIRONMENT}-latest";
         docker push "usgs/${CI_PROJECT_NAME}:${ENVIRONMENT}-latest";
 
-        if [[ ${CI_COMMIT_REF_SLUG} == "${CI_DEFAULT_BRANCH" ]]; then
+        if [[ ${CI_COMMIT_REF_SLUG} == "${CI_DEFAULT_BRANCH}" ]]; then
           docker tag \
               "usgs/${CI_PROJECT_NAME}:${ENVIRONMENT}-latest" \
               "usgs/${CI_PROJECT_NAME}:latest";