diff --git a/change/@fluentui-merge-styles-917f7ae8-0a61-47db-83f7-e29e8264ac4e.json b/change/@fluentui-merge-styles-917f7ae8-0a61-47db-83f7-e29e8264ac4e.json
new file mode 100644
index 0000000000000..a8cdf823eb0b4
--- /dev/null
+++ b/change/@fluentui-merge-styles-917f7ae8-0a61-47db-83f7-e29e8264ac4e.json
@@ -0,0 +1,7 @@
+{
+  "type": "patch",
+  "comment": "fix: keep same type output for DeepPartialV2 to match original DeepPartial",
+  "packageName": "@fluentui/merge-styles",
+  "email": "martinhochel@microsoft.com",
+  "dependentChangeType": "patch"
+}
diff --git a/packages/merge-styles/src/DeepPartial.ts b/packages/merge-styles/src/DeepPartial.ts
index ca351bd5feb54..cfca387a79bee 100644
--- a/packages/merge-styles/src/DeepPartial.ts
+++ b/packages/merge-styles/src/DeepPartial.ts
@@ -1,3 +1,5 @@
+/* eslint-disable @fluentui/max-len */
+
 /**
  * TypeScript type to return a deep partial object (each property can be undefined, recursively.)
  * @deprecated - This type will hit infinite type instantiation recursion. Please use {@link DeepPartialV2}
@@ -13,8 +15,14 @@ type DeepPartialObject<T> = {
   [Key in keyof T]?: DeepPartialV2<T[Key]>;
 };
 
+/**
+ * Why `T extends Function ? {}` :
+ * While this transform is incorrect, in order not run into infinite type instantiation to maintain type creation compatibility with original {@link DeepPartial} we need to hit `[P in keyof T]? T[P]` part of the mapped type from original,
+ * which would transform to bottom type `{}` if `Function` would be `T`
+ *
+ */
 export type DeepPartialV2<T> = T extends Function
-  ? T
+  ? {}
   : T extends Array<infer U>
   ? IDeepPartialArray<U>
   : T extends object