diff --git a/libavcodec/intrax8.c b/libavcodec/intrax8.c
index 3ab2b6d029..1f006f9ce9 100644
--- a/libavcodec/intrax8.c
+++ b/libavcodec/intrax8.c
@@ -653,7 +653,7 @@ static inline void x8_init_block_index(MpegEncContext *s){ //FIXME maybe merge w
     s->dest[1] = s->current_picture.data[1];
     s->dest[2] = s->current_picture.data[2];
 
-    s->dest[0] += s->mb_y *   linesize << 3;
+    s->dest[0] +=   s->mb_y        *   linesize << 3;
     s->dest[1] += ( s->mb_y&(~1) ) * uvlinesize << 2;//chroma blocks are on add rows
     s->dest[2] += ( s->mb_y&(~1) ) * uvlinesize << 2;
 }