diff --git a/libavcodec/svq3.c b/libavcodec/svq3.c
index 499d11d6bf..f6fe071657 100644
--- a/libavcodec/svq3.c
+++ b/libavcodec/svq3.c
@@ -788,6 +788,7 @@ static int svq3_decode_init(AVCodecContext *avctx)
     s->flags  = avctx->flags;
     s->flags2 = avctx->flags2;
     s->unrestricted_mv = 1;
+    h->is_complex=1;
 
     if (!s->context_initialized) {
         s->width  = avctx->width;