diff --git a/include/wincodecsdk.idl b/include/wincodecsdk.idl
index d83349c6725..ed00cfbf2d9 100644
--- a/include/wincodecsdk.idl
+++ b/include/wincodecsdk.idl
@@ -167,6 +167,23 @@ interface IWICMetadataBlockWriter : IWICMetadataBlockReader
         [in] UINT nIndex);
 }
 
+[
+    object,
+    uuid(00675040-6908-45f8-86a3-49c7dfd6d9ad)
+]
+interface IWICPersistStream : IPersistStream
+{
+    HRESULT LoadEx(
+        [in, unique] IStream *pIStream,
+        [in, unique] const GUID *pguidPreferredVendor,
+        [in] DWORD dwPersistOptions);
+
+    HRESULT SaveEx(
+        [in] IStream *pIStream,
+        [in] DWORD dwPersistOptions,
+        [in] BOOL fClearDirty);
+}
+
 [
     object,
     uuid(412d0c3a-9650-44fa-af5b-dd2a06c8e8fb)