diff --git a/startup.sh b/startup.sh
index 7de7444..d3f6351 100755
--- a/startup.sh
+++ b/startup.sh
@@ -113,6 +113,11 @@ if [ "${POSTGRES_JNDI_ENABLED}" = "true" ]; then
   # Use a custom "web.xml" if the user mounted one into the container
   if [ -d "${CONFIG_OVERRIDES_DIR}" ] && [ -f "${CONFIG_OVERRIDES_DIR}/web.xml" ]; then
     echo "Installing configuration override for web.xml with substituted environment variables"
+    
+    if [ "${CORS_ENABLED}" = "true" ]; then 
+      echo "Warning: the CORS_ENABLED's changes will be overwritten!"
+    fi
+    
     envsubst < "${CONFIG_OVERRIDES_DIR}"/web.xml > "${CATALINA_HOME}/webapps/geoserver/WEB-INF/web.xml"
   fi
 fi