diff --git a/sys/mediafoundation/gstmfsourcereader.cpp b/sys/mediafoundation/gstmfsourcereader.cpp
index 3d6dd63c4e..78572f3c4c 100644
--- a/sys/mediafoundation/gstmfsourcereader.cpp
+++ b/sys/mediafoundation/gstmfsourcereader.cpp
@@ -74,6 +74,7 @@ struct _GstMFSourceReader
   /* protected by lock */
   GstQueueArray *queue;
 
+  IMFActivate *activate;
   IMFMediaSource *source;
   IMFSourceReader *reader;
 
@@ -307,6 +308,8 @@ gst_mf_source_reader_open (GstMFSourceReader * self, IMFActivate * activate)
     return FALSE;
   }
 
+  self->activate = activate;
+  activate->AddRef ();
   self->source = source.Detach ();
   self->reader = reader.Detach ();
 
@@ -332,6 +335,12 @@ gst_mf_source_reader_close (GstMFSourceReader * self)
 {
   gst_clear_caps (&self->supported_caps);
 
+  if (self->activate) {
+    self->activate->ShutdownObject ();
+    self->activate->Release ();
+    self->activate = NULL;
+  }
+
   if (self->media_types) {
     g_list_free_full (self->media_types,
         (GDestroyNotify) gst_mf_stream_media_type_free);
diff --git a/sys/mediafoundation/gstmftransform.cpp b/sys/mediafoundation/gstmftransform.cpp
index c6424535eb..10b0c2f5ae 100644
--- a/sys/mediafoundation/gstmftransform.cpp
+++ b/sys/mediafoundation/gstmftransform.cpp
@@ -1040,6 +1040,11 @@ gst_mf_transform_close (GstMFTransform * object)
 
   gst_mf_transform_flush (object);
 
+  /* Otherwise IMFTransform will be alive even after we release the IMFTransform
+   * below */
+  if (object->activate)
+    object->activate->ShutdownObject ();
+
   if (object->callback_object) {
     object->callback_object->Release ();
     object->callback_object = nullptr;