diff --git a/machamp_scripts/Dockerfile b/machamp_scripts/Dockerfile
index a5f3878ed..9705010fb 100644
--- a/machamp_scripts/Dockerfile
+++ b/machamp_scripts/Dockerfile
@@ -95,7 +95,7 @@ RUN set -eux; \
         echo '#!/bin/sh' > /usr/local/bin/docker-entrypoint.sh; \
         echo 'set -e' >> /usr/local/bin/docker-entrypoint.sh; \
         echo "# perpend `keydb-server` if not provided as first argument" >> /usr/local/bin/docker-entrypoint.sh; \
-        echo 'if [  != "keydb-server" ]' >> /usr/local/bin/docker-entrypoint.sh; \
+        echo 'if [ "${1}" != "keydb-server" ]; then' >> /usr/local/bin/docker-entrypoint.sh; \
         echo '        set -- keydb-server "$@"' >> /usr/local/bin/docker-entrypoint.sh; \
         echo 'fi' >> /usr/local/bin/docker-entrypoint.sh; \
         echo "# allow the container to be started with `--user`" >> /usr/local/bin/docker-entrypoint.sh; \