diff --git a/packages/roosterjs-content-model-dom/lib/constants/ChangeSource.ts b/packages/roosterjs-content-model-dom/lib/constants/ChangeSource.ts
index e77d03952922..cbaa372038f1 100644
--- a/packages/roosterjs-content-model-dom/lib/constants/ChangeSource.ts
+++ b/packages/roosterjs-content-model-dom/lib/constants/ChangeSource.ts
@@ -23,6 +23,10 @@ export const ChangeSource = {
      * Content changed by paste
      */
     Paste: 'Paste',
+    /**
+     * Content changed by auto markdown conversion
+     */
+    AutoMarkdownConversion: 'AutoMarkdownConversion',
     /**
      * Content changed by setContent API
      */
diff --git a/packages/roosterjs-content-model-markdown/lib/plugins/MarkdownPastePlugin.ts b/packages/roosterjs-content-model-markdown/lib/plugins/MarkdownPastePlugin.ts
index a7968332bfda..b75e2c576e5c 100644
--- a/packages/roosterjs-content-model-markdown/lib/plugins/MarkdownPastePlugin.ts
+++ b/packages/roosterjs-content-model-markdown/lib/plugins/MarkdownPastePlugin.ts
@@ -102,6 +102,7 @@ export class MarkdownPastePlugin implements EditorPlugin {
                     },
                     {
                         apiName: 'MarkdownConversion',
+                        changeSource: ChangeSource.AutoMarkdownConversion,
                         scrollCaretIntoView: true,
                     }
                 );
diff --git a/packages/roosterjs-content-model-markdown/test/plugins/MarkdownPastePluginTest.ts b/packages/roosterjs-content-model-markdown/test/plugins/MarkdownPastePluginTest.ts
index adb7388033db..c63417184699 100644
--- a/packages/roosterjs-content-model-markdown/test/plugins/MarkdownPastePluginTest.ts
+++ b/packages/roosterjs-content-model-markdown/test/plugins/MarkdownPastePluginTest.ts
@@ -1,4 +1,5 @@
 import { MarkdownPastePlugin } from '../../lib/plugins/MarkdownPastePlugin';
+import { ChangeSource } from 'roosterjs-content-model-dom';
 import type {
     BeforePasteEvent,
     ClipboardData,
@@ -90,7 +91,7 @@ describe('MarkdownPastePlugin', () => {
     ): ContentChangedEvent {
         return ({
             eventType: 'contentChanged',
-            source: 'Paste',
+            source: ChangeSource.Paste,
             data: clipboardData as ClipboardData,
         } as unknown) as ContentChangedEvent;
     }
@@ -171,7 +172,11 @@ describe('MarkdownPastePlugin', () => {
             (model: ContentModelDocument) => boolean,
             FormatContentModelOptions
         ];
-        expect(options).toEqual({ apiName: 'MarkdownConversion', scrollCaretIntoView: true });
+        expect(options).toEqual({
+            apiName: 'MarkdownConversion',
+            changeSource: ChangeSource.AutoMarkdownConversion,
+            scrollCaretIntoView: true,
+        });
 
         const target = createEmptyModel();
         expect(callback(target)).toBe(true);