diff --git a/packages/nodes-base/nodes/Mattermost/GenericFunctions.ts b/packages/nodes-base/nodes/Mattermost/GenericFunctions.ts
index ac712e1d6..329e3ae83 100644
--- a/packages/nodes-base/nodes/Mattermost/GenericFunctions.ts
+++ b/packages/nodes-base/nodes/Mattermost/GenericFunctions.ts
@@ -10,11 +10,11 @@ import { IDataObject } from 'n8n-workflow';
 export interface IAttachment  {
 	fields: {
 		item?: object[];
-	},
+	};
 	actions: {
 		item?: object[];
 	};
-} 
+}
 
 /**
  * Make an API request to Telegram
diff --git a/packages/nodes-base/nodes/Mattermost/Mattermost.node.ts b/packages/nodes-base/nodes/Mattermost/Mattermost.node.ts
index 77d6b00f0..e9f81e7d8 100644
--- a/packages/nodes-base/nodes/Mattermost/Mattermost.node.ts
+++ b/packages/nodes-base/nodes/Mattermost/Mattermost.node.ts
@@ -522,6 +522,9 @@ export class Mattermost implements INodeType {
 												data_source: [
 													'custom'
 												],
+												type: [
+													'select'
+												],
 											},
 										},
 										default: {},