diff --git a/sdk/eventhub/arm-eventhub/src/models/parameters.ts b/sdk/eventhub/arm-eventhub/src/models/parameters.ts
index 6337f926eac5..382fd6513e8a 100644
--- a/sdk/eventhub/arm-eventhub/src/models/parameters.ts
+++ b/sdk/eventhub/arm-eventhub/src/models/parameters.ts
@@ -105,7 +105,7 @@ export const eventHubName: msRest.OperationURLParameter = {
     required: true,
     serializedName: "eventHubName",
     constraints: {
-      MaxLength: 50,
+      MaxLength: 256,
       MinLength: 1
     },
     type: {