diff --git a/.platform.app.yaml b/.platform.app.yaml
index e2c14f82e9..d9f8be0088 100644
--- a/.platform.app.yaml
+++ b/.platform.app.yaml
@@ -112,7 +112,7 @@ hooks:
         nvm current
         nvm install 10.15.3
 
-        if ["$COMPOSER_AUTH" == ""]; then
+        if [ -z "$COMPOSER_AUTH" ]; then
             echo "TIP: If you need to authenticate against Github/Gitlab/updates.ez.no, use COMPOSER_AUTH env variable"
             echo "See: https://docs.platform.sh/tutorials/composer-auth.html#set-the-envcomposerauth-project-variable"
         fi