diff --git a/change/@fluentui-react-file-type-icons-a5bb0fd5-0787-41e8-8a95-64038f871664.json b/change/@fluentui-react-file-type-icons-a5bb0fd5-0787-41e8-8a95-64038f871664.json
new file mode 100644
index 00000000000000..7ce4d70c6f6942
--- /dev/null
+++ b/change/@fluentui-react-file-type-icons-a5bb0fd5-0787-41e8-8a95-64038f871664.json
@@ -0,0 +1,7 @@
+{
+  "type": "patch",
+  "comment": "Map mhtml extension to html icon",
+  "packageName": "@fluentui/react-file-type-icons",
+  "email": "alinazaieva@microsoft.com",
+  "dependentChangeType": "patch"
+}
diff --git a/packages/react-file-type-icons/src/FileTypeIconMap.ts b/packages/react-file-type-icons/src/FileTypeIconMap.ts
index 11cf3c7a1913a1..6214161afa381a 100644
--- a/packages/react-file-type-icons/src/FileTypeIconMap.ts
+++ b/packages/react-file-type-icons/src/FileTypeIconMap.ts
@@ -288,7 +288,7 @@ export const FileTypeIconMap: { [key: string]: { extensions?: string[] } } = {
   form: {},
   genericfile: {},
   html: {
-    extensions: ['htm', 'html', 'mht'],
+    extensions: ['htm', 'html', 'mht', 'mhtml'],
   },
   ipynb: {
     extensions: ['nnb', 'ipynb'],