diff --git a/libavcodec/idctdsp.c b/libavcodec/idctdsp.c
index 6e238bbca5..94bad73cf3 100644
--- a/libavcodec/idctdsp.c
+++ b/libavcodec/idctdsp.c
@@ -300,7 +300,7 @@ av_cold void ff_idctdsp_init(IDCTDSPContext *c, AVCodecContext *avctx)
     c->put_signed_pixels_clamped = put_signed_pixels_clamped_c;
     c->add_pixels_clamped        = add_pixels_clamped_c;
 
-    if (CONFIG_MPEG4_DECODER && avctx->idct_algo == FF_IDCT_XVIDMMX)
+    if (CONFIG_MPEG4_DECODER && avctx->idct_algo == FF_IDCT_XVID)
         ff_xvididct_init(c, avctx);
 
     if (ARCH_ALPHA)
diff --git a/libavcodec/mpeg4videodec.c b/libavcodec/mpeg4videodec.c
index f5eec3f2d1..021f2c5ac6 100644
--- a/libavcodec/mpeg4videodec.c
+++ b/libavcodec/mpeg4videodec.c
@@ -2214,7 +2214,7 @@ int ff_mpeg4_workaround_bugs(AVCodecContext *avctx)
         s->codec_id == AV_CODEC_ID_MPEG4 &&
         avctx->idct_algo == FF_IDCT_AUTO &&
         (av_get_cpu_flags() & AV_CPU_FLAG_MMX)) {
-        avctx->idct_algo = FF_IDCT_XVIDMMX;
+        avctx->idct_algo = FF_IDCT_XVID;
         ff_dct_common_init(s);
         return 1;
     }