diff --git a/libavcodec/eatqi.c b/libavcodec/eatqi.c
index 8688f59193..d3b2a971a2 100644
--- a/libavcodec/eatqi.c
+++ b/libavcodec/eatqi.c
@@ -51,7 +51,6 @@ typedef struct TqiContext {
     int last_dc[3];
 
     DECLARE_ALIGNED(16, int16_t, block)[6][64];
-    int block_last_index[12];
 } TqiContext;
 
 static av_cold int tqi_decode_init(AVCodecContext *avctx)
@@ -79,7 +78,7 @@ static int tqi_decode_mb(TqiContext *t, int16_t (*block)[64])
         int ret = ff_mpeg1_decode_block_intra(&t->gb,
                                               t->intra_matrix,
                                               t->intra_scantable.permutated,
-                                              t->last_dc, block[n], n, 1, t->block_last_index);
+                                              t->last_dc, block[n], n, 1);
         if (ret < 0)
             return -1;
     }
diff --git a/libavcodec/mpeg12.c b/libavcodec/mpeg12.c
index d92d24a836..7c140529ec 100644
--- a/libavcodec/mpeg12.c
+++ b/libavcodec/mpeg12.c
@@ -248,8 +248,7 @@ int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size,
 int ff_mpeg1_decode_block_intra(GetBitContext *gb,
                                 const uint16_t *quant_matrix,
                                 uint8_t *const scantable, int last_dc[3],
-                                int16_t *block, int index, int qscale,
-                                int block_last_index[12])
+                                int16_t *block, int index, int qscale)
 {
     int dc, diff, i = 0, component;
     RLTable *rl = &ff_rl_mpeg1;
@@ -335,8 +334,7 @@ end:
     }
 
     if (i > MAX_INDEX)
-        return AVERROR_INVALIDDATA;
+        i = AVERROR_INVALIDDATA;
 
-    block_last_index[index] = i;
-    return 0;
+    return i;
 }
diff --git a/libavcodec/mpeg12.h b/libavcodec/mpeg12.h
index f8e2d23824..a20ef92368 100644
--- a/libavcodec/mpeg12.h
+++ b/libavcodec/mpeg12.h
@@ -53,8 +53,7 @@ static inline int decode_dc(GetBitContext *gb, int component)
 int ff_mpeg1_decode_block_intra(GetBitContext *gb,
                                 const uint16_t *quant_matrix,
                                 uint8_t *const scantable, int last_dc[3],
-                                int16_t *block, int index, int qscale,
-                                int block_last_index[12]);
+                                int16_t *block, int index, int qscale);
 
 void ff_mpeg1_clean_buffers(MpegEncContext *s);
 int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size, AVCodecParserContext *s);
diff --git a/libavcodec/mpeg12dec.c b/libavcodec/mpeg12dec.c
index 55f9207782..4bdb32a7f7 100644
--- a/libavcodec/mpeg12dec.c
+++ b/libavcodec/mpeg12dec.c
@@ -792,7 +792,7 @@ static int mpeg_decode_mb(MpegEncContext *s, int16_t block[12][64])
                                                   s->intra_matrix,
                                                   s->intra_scantable.permutated,
                                                   s->last_dc, *s->pblocks[i],
-                                                  i, s->qscale, s->block_last_index);
+                                                  i, s->qscale);
                 if (ret < 0) {
                     av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n",
                            s->mb_x, s->mb_y);