diff --git a/libavcodec/mpegvideo_enc.c b/libavcodec/mpegvideo_enc.c
index 6adcd483f4..eda2305630 100644
--- a/libavcodec/mpegvideo_enc.c
+++ b/libavcodec/mpegvideo_enc.c
@@ -291,7 +291,7 @@ static void mpv_encode_defaults(MpegEncContext *s)
     s->picture_in_gop_number = 0;
 }
 
-av_cold int ff_dct_encode_init(MpegEncContext *s)
+av_cold void ff_dct_encode_init(MpegEncContext *s)
 {
     s->dct_quantize = dct_quantize_c;
     s->denoise_dct  = denoise_dct_c;
@@ -304,8 +304,6 @@ av_cold int ff_dct_encode_init(MpegEncContext *s)
 
     if (s->avctx->trellis)
         s->dct_quantize  = dct_quantize_trellis_c;
-
-    return 0;
 }
 
 /* init video encoder */
diff --git a/libavcodec/mpegvideoenc.h b/libavcodec/mpegvideoenc.h
index 465fb21657..f5044a0309 100644
--- a/libavcodec/mpegvideoenc.h
+++ b/libavcodec/mpegvideoenc.h
@@ -145,7 +145,7 @@ int ff_mpv_reallocate_putbitbuffer(MpegEncContext *s, size_t threshold, size_t s
 
 void ff_write_quant_matrix(PutBitContext *pb, uint16_t *matrix);
 
-int ff_dct_encode_init(MpegEncContext *s);
+void ff_dct_encode_init(MpegEncContext *s);
 void ff_mpvenc_dct_init_mips(MpegEncContext *s);
 void ff_dct_encode_init_x86(MpegEncContext *s);