diff --git a/libavcodec/4xm.c b/libavcodec/4xm.c
index 9bd026b5a246cd8a2530ef133ec5c3b60962258e..cc0bcd4f86bf5ad61311d99adcb19d9e150c5dc5 100644
--- a/libavcodec/4xm.c
+++ b/libavcodec/4xm.c
@@ -137,7 +137,7 @@ typedef struct FourXContext{
     int mv[256];
     VLC pre_vlc;
     int last_dc;
-    DECLARE_ALIGNED_8(DCTELEM, block[6][64]);
+    DECLARE_ALIGNED_16(DCTELEM, block[6][64]);
     void *bitstream_buffer;
     unsigned int bitstream_buffer_size;
     int version;