diff --git a/libavcodec/mpegvideo.c b/libavcodec/mpegvideo.c
index c89926ff3eb7b58e8d98d44e4421cf67b6adcd46..c27e8fe1a3b4e232d1dc7fceffc4264e6853cb18 100644
--- a/libavcodec/mpegvideo.c
+++ b/libavcodec/mpegvideo.c
@@ -5494,7 +5494,7 @@ static int dct_quantize_refine(MpegEncContext *s, //FIXME breaks denoise?
                         DCTELEM *block, int16_t *weight, DCTELEM *orig,
                         int n, int qscale){
     int16_t rem[64];
-    DCTELEM d1[64];
+    DCTELEM d1[64] __align16;
     const int *qmat;
     const uint8_t *scantable= s->intra_scantable.scantable;
     const uint8_t *perm_scantable= s->intra_scantable.permutated;