diff --git a/gazpar2mqtt/rootfs/scripts/99-run.sh b/gazpar2mqtt/rootfs/scripts/99-run.sh
index c362f0ecc..9c6f23345 100644
--- a/gazpar2mqtt/rootfs/scripts/99-run.sh
+++ b/gazpar2mqtt/rootfs/scripts/99-run.sh
@@ -21,6 +21,7 @@ else
 fi
 
 # Check if yaml is valid
+EXIT_CODE=0
 yamllint -d relaxed --no-warnings $CONFIGSOURCE &> ERROR || EXIT_CODE=$?
 if [ $EXIT_CODE = 0 ]; then
     echo "Config file is a valid yaml"