diff --git a/libavcodec/mfenc.c b/libavcodec/mfenc.c
index 942c75cb9d..6f79386404 100644
--- a/libavcodec/mfenc.c
+++ b/libavcodec/mfenc.c
@@ -1366,6 +1366,9 @@ static int mf_close(AVCodecContext *avctx)
     if (c->async_events)
         IMFMediaEventGenerator_Release(c->async_events);
 
+    if (c->dxgiManager)
+        IMFDXGIDeviceManager_Release(c->dxgiManager);
+
 #if !HAVE_UWP
     if (c->library)
         ff_free_mf(&c->functions, &c->mft);