diff --git a/.templates/01-custom_script.sh b/.templates/01-custom_script.sh
index cb9ea5817..78bc5f448 100644
--- a/.templates/01-custom_script.sh
+++ b/.templates/01-custom_script.sh
@@ -4,7 +4,7 @@
 slug="${HOSTNAME#*-}"
 bashio::log.info "Execute if existing custom script /config/${slug}.sh"
 
-if [ -f /config/${slug}.sh ]; then
+if [ -f /config/"${slug}".sh ]; then
   chmod +x /config/"${slug}".sh
   /./config/"${slug}".sh
 else