diff --git a/libavcodec/wmadec.c b/libavcodec/wmadec.c
index 3da1a60c19..840025d493 100644
--- a/libavcodec/wmadec.c
+++ b/libavcodec/wmadec.c
@@ -827,7 +827,7 @@ static int wma_decode_superframe(AVCodecContext *avctx,
         return 0;
     }
     if (buf_size < s->block_align)
-        return 0;
+        return AVERROR(EINVAL);
     buf_size = s->block_align;
 
     samples = data;