diff --git a/src/Nest/Cluster/NodesInfo/NodeRole.cs b/src/Nest/Cluster/NodesInfo/NodeRole.cs
index 609e59e8906..effc4b8e632 100644
--- a/src/Nest/Cluster/NodesInfo/NodeRole.cs
+++ b/src/Nest/Cluster/NodesInfo/NodeRole.cs
@@ -16,6 +16,9 @@ public enum NodeRole
 		Client,
 
 		[EnumMember(Value = "ingest")]
-		Ingest
+		Ingest,
+
+		[EnumMember(Value = "ml")]
+		MachineLearning
 	}
 }