diff --git a/docker/idhub.entrypoint.sh b/docker/idhub.entrypoint.sh
index 7c2ba29..c871ca8 100755
--- a/docker/idhub.entrypoint.sh
+++ b/docker/idhub.entrypoint.sh
@@ -109,7 +109,7 @@ main() {
 
         inject_env_vars
 
-        if [ ! "${DEBUG}" = "true" ]; then
+        if [ ! "${DEBUG:-}" = "true" ]; then
                 ./manage.py collectstatic
         fi