diff --git a/libavcodec/h264dec.h b/libavcodec/h264dec.h
index e994f7e7fe..af3d98bb32 100644
--- a/libavcodec/h264dec.h
+++ b/libavcodec/h264dec.h
@@ -415,6 +415,7 @@ typedef struct H264Context {
     uint8_t (*mvd_table[2])[2];
     uint8_t *direct_table;
 
+    uint8_t scan_padding[16];
     uint8_t zigzag_scan[16];
     uint8_t zigzag_scan8x8[64];
     uint8_t zigzag_scan8x8_cavlc[64];