diff --git a/specification/operationalinsights/resource-manager/readme.md b/specification/operationalinsights/resource-manager/readme.md
index da6e415f2e36..3f3cabab589c 100644
--- a/specification/operationalinsights/resource-manager/readme.md
+++ b/specification/operationalinsights/resource-manager/readme.md
@@ -187,4 +187,8 @@ directive:
     from: OperationalInsights.json
     where: $.definitions.DataSourceFilter.properties.kind
     reason: False positive. Description inherited from reference.
+  - suppress: EnumInsteadOfBoolean
+    from: OperationalInsights.json
+    where: $.definitions.ManagementGroupProperties.properties.isGateway
+    reason: This validation error cannot be removed due to technical constraints on your service side.
 ```