1 files changed, 2 insertions, 2 deletions
diff --git a/libavcodec/snow.c b/libavcodec/snow.c
index e2ecdf053f..99cd5fbc1d 100644
--- a/libavcodec/snow.c
+++ b/libavcodec/snow.c
@@ -81,8 +81,8 @@ void ff_snow_reset_contexts(SnowContext *s){ //FIXME better initial contexts
 }
 
 int ff_snow_alloc_blocks(SnowContext *s){
-    int w= -((-s->avctx->width )>>LOG2_MB_SIZE);
-    int h= -((-s->avctx->height)>>LOG2_MB_SIZE);
+    int w= FF_CEIL_RSHIFT(s->avctx->width,  LOG2_MB_SIZE);
+    int h= FF_CEIL_RSHIFT(s->avctx->height, LOG2_MB_SIZE);
 
     s->b_width = w;
     s->b_height= h;