diff --git a/packages/api/src/models/attachment/attachment-layout.ts b/packages/api/src/models/attachment/attachment-layout.ts
index 1f85172d3..195aabe80 100644
--- a/packages/api/src/models/attachment/attachment-layout.ts
+++ b/packages/api/src/models/attachment/attachment-layout.ts
@@ -1 +1 @@
-export type AttachmentLayout = 'list' | 'grid';
+export type AttachmentLayout = 'list' | 'carousel';
diff --git a/packages/api/src/models/messaging-extension/index.ts b/packages/api/src/models/messaging-extension/index.ts
index b1d3feaf1..61e3f2160 100644
--- a/packages/api/src/models/messaging-extension/index.ts
+++ b/packages/api/src/models/messaging-extension/index.ts
@@ -6,3 +6,4 @@ export * from './messaging-extension-parameter';
 export * from './messaging-extension-query';
 export * from './messaging-extension-action';
 export * from './messaging-extension-action-response';
+export * from './messaging-extension-attachment-layout';
diff --git a/packages/api/src/models/messaging-extension/messaging-extension-attachment-layout.ts b/packages/api/src/models/messaging-extension/messaging-extension-attachment-layout.ts
new file mode 100644
index 000000000..6c279e3d1
--- /dev/null
+++ b/packages/api/src/models/messaging-extension/messaging-extension-attachment-layout.ts
@@ -0,0 +1 @@
+export type MessagingExtensionAttachmentLayout = 'list' | 'grid';
diff --git a/packages/api/src/models/messaging-extension/messaging-extension-result.ts b/packages/api/src/models/messaging-extension/messaging-extension-result.ts
index 6fce3aa4c..396672ee9 100644
--- a/packages/api/src/models/messaging-extension/messaging-extension-result.ts
+++ b/packages/api/src/models/messaging-extension/messaging-extension-result.ts
@@ -1,7 +1,7 @@
 import { Activity } from '../../activities';
-import { AttachmentLayout } from '../attachment';
 
 import { MessagingExtensionAttachment } from './messaging-extension-attachment';
+import { MessagingExtensionAttachmentLayout } from './messaging-extension-attachment-layout';
 import { MessagingExtensionSuggestedAction } from './messaging-extension-suggested-action';
 
 /**
@@ -27,10 +27,10 @@ export type MessagingExtensionResultType =
  */
 export type MessagingExtensionResult = {
   /**
-   * @member {AttachmentLayout} [attachmentLayout] Hint for how to deal with
+   * @member {MessagingExtensionAttachmentLayout} [attachmentLayout] Hint for how to deal with
    * multiple attachments. Possible values include: 'list', 'grid'
    */
-  attachmentLayout?: AttachmentLayout;
+  attachmentLayout?: MessagingExtensionAttachmentLayout;
 
   /**
    * @member {MessagingExtensionResultType} [type] The type of the result. Possible values include: