diff --git a/src/gallium/frontends/vdpau/mixer.c b/src/gallium/frontends/vdpau/mixer.c
index 2e2bd20ef39..98da01d3e4c 100644
--- a/src/gallium/frontends/vdpau/mixer.c
+++ b/src/gallium/frontends/vdpau/mixer.c
@@ -331,6 +331,9 @@ VdpStatus vlVdpVideoMixerRender(VdpVideoMixer mixer,
       }
    }
 
+   if (!destination_video_rect)
+      destination_video_rect = video_source_rect;
+
    prect = RectToPipe(video_source_rect, &rect);
    if (!prect) {
       rect.x0 = 0;