diff --git a/src/schemas/json/rumdl.json b/src/schemas/json/rumdl.json
index 3d2dc84d80d..e169e137915 100644
--- a/src/schemas/json/rumdl.json
+++ b/src/schemas/json/rumdl.json
@@ -73,7 +73,7 @@
       "type": "object",
       "properties": {
         "enable": {
-          "description": "Enabled rules",
+          "description": "Enabled rules. Use \"ALL\" to enable all rules.",
           "type": "array",
           "items": {
             "type": "string"