diff --git a/tools/dind/config/services/resin-supervisor-dind.service b/tools/dind/config/services/resin-supervisor-dind.service
index 3d7eac6c..8b45f153 100644
--- a/tools/dind/config/services/resin-supervisor-dind.service
+++ b/tools/dind/config/services/resin-supervisor-dind.service
@@ -8,7 +8,7 @@ Before=openvpn-resin.service
 WorkingDirectory=/usr/src/app
 EnvironmentFile=/usr/src/app/config/env
 EnvironmentFile=/usr/src/app/config/localenv
-ExecStartPre=/bin/bash -c 'if [ "${PRELOADED_IMAGE}" -eq "true" ]; then /usr/bin/docker pull $(jq ".[0].imageId" ${APPS_PATH}); fi'
+ExecStartPre=/bin/bash -c 'if [ "${PRELOADED_IMAGE}" == "true" ]; then /usr/bin/docker pull $(jq ".[0].imageId" ${APPS_PATH}); fi'
 ExecStartPre=/usr/bin/docker pull ${SUPERVISOR_IMAGE}
 ExecStartPre=-/usr/bin/docker kill resin_supervisor
 ExecStartPre=-/usr/bin/docker rm resin_supervisor