diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index f2ffc37a371da2bd07bb0e8f98112281c8290ffc..33c3c22672af6935765ddcef275397a124ff754a 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -13,7 +13,6 @@ OBJS= bitstream.o \
       jrevdct.o \
       jfdctfst.o \
       jfdctint.o\
-      mpegidct.o \
       resample.o \
       resample2.o \
       dsputil.o \
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index 819f71fee61382f310262eced9eed88291937452..c90b2cdc443916f1e6a9016d249dc21ee71a1090 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -1278,7 +1278,6 @@ typedef struct AVCodecContext {
 #define FF_IDCT_CAVS         15
 #define FF_IDCT_SIMPLEARMV5TE 16
 #define FF_IDCT_SIMPLEARMV6  17
-#define FF_IDCT_MPEG         18
 
     /**
      * slice count
diff --git a/libavcodec/dsputil.c b/libavcodec/dsputil.c
index ec0fc1abbdc1d49c3d1cad4dd6818db3b7243e6c..41fef24df14f60573d0ef25443faa048355a4f97 100644
--- a/libavcodec/dsputil.c
+++ b/libavcodec/dsputil.c
@@ -3753,17 +3753,6 @@ void ff_float_to_int16_c(int16_t *dst, const float *src, int len){
 
 /* XXX: those functions should be suppressed ASAP when all IDCTs are
  converted */
-static void ff_mpeg_idct_put_c(uint8_t *dest, int line_size, DCTELEM *block)
-{
-    ff_mpeg_idct_c(block);
-    put_pixels_clamped_c(block, dest, line_size);
-}
-static void ff_mpeg_idct_add_c(uint8_t *dest, int line_size, DCTELEM *block)
-{
-    ff_mpeg_idct_c(block);
-    add_pixels_clamped_c(block, dest, line_size);
-}
-
 static void ff_jref_idct_put(uint8_t *dest, int line_size, DCTELEM *block)
 {
     j_rev_dct (block);
@@ -3902,11 +3891,6 @@ void dsputil_init(DSPContext* c, AVCodecContext *avctx)
             c->idct_add= ff_vp3_idct_add_c;
             c->idct    = ff_vp3_idct_c;
             c->idct_permutation_type= FF_NO_IDCT_PERM;
-        }else if(avctx->idct_algo==FF_IDCT_MPEG){
-            c->idct_put= ff_mpeg_idct_put_c;
-            c->idct_add= ff_mpeg_idct_add_c;
-            c->idct    = ff_mpeg_idct_c;
-            c->idct_permutation_type= FF_NO_IDCT_PERM;
         }else{ //accurate/default
             c->idct_put= simple_idct_put;
             c->idct_add= simple_idct_add;
diff --git a/libavcodec/dsputil.h b/libavcodec/dsputil.h
index 80bcd62dc965f7c20f41d572e33cb2a082718f9a..2d312e519651db72d41276696eee419f820cf89c 100644
--- a/libavcodec/dsputil.h
+++ b/libavcodec/dsputil.h
@@ -47,7 +47,6 @@ void j_rev_dct (DCTELEM *data);
 void j_rev_dct4 (DCTELEM *data);
 void j_rev_dct2 (DCTELEM *data);
 void j_rev_dct1 (DCTELEM *data);
-void ff_mpeg_idct_c(DCTELEM *data);
 
 void ff_fdct_mmx(DCTELEM *block);
 void ff_fdct_mmx2(DCTELEM *block);