diff --git a/libavcodec/ac3enc.c b/libavcodec/ac3enc.c
index 5be791c1d3..5ec8b4f5ac 100644
--- a/libavcodec/ac3enc.c
+++ b/libavcodec/ac3enc.c
@@ -1377,7 +1377,7 @@ static int AC3_encode_frame(AVCodecContext *avctx,
             v = 14 - log2_tab(input_samples, N);
             if (v < 0)
                 v = 0;
-            exp_samples[i][ch] = v - 8;
+            exp_samples[i][ch] = v - 9;
             lshift_tab(input_samples, N, v);
 
             /* do the MDCT */
diff --git a/tests/ffmpeg.regression.ref b/tests/ffmpeg.regression.ref
index ec3441c5d3..703ac10d72 100644
--- a/tests/ffmpeg.regression.ref
+++ b/tests/ffmpeg.regression.ref
@@ -150,7 +150,7 @@ stddev: 10.99 PSNR:27.30 bytes:7602176
 6956f2c5185c4edbae648c614992a14b *./data/out.wav
 stddev:9330.70 PSNR:16.92 bytes:527360
 stddev:4396.13 PSNR:23.46 bytes:526336
-4292b4f8e930e386e9c00799197615e5 *./data/a-ac3.rm
+aefe11ab5067621a1c674859d6413891 *./data/a-ac3.rm
 98203 ./data/a-ac3.rm
 9e6e66847a568ef4f1f229b0939d2aae *./data/a-g726.wav
 24268 ./data/a-g726.wav
diff --git a/tests/libav.regression.ref b/tests/libav.regression.ref
index 49f26ff1bf..88bb54b67e 100644
--- a/tests/libav.regression.ref
+++ b/tests/libav.regression.ref
@@ -5,7 +5,7 @@ ffmpeg regression test
 6f4dca897d9a009009798e434fe5f651 *./data/b-libav.asf
  342967 ./data/b-libav.asf
 ./data/b-libav.asf CRC=0x41af1ed9
-4509d6cc5523484d4557b2e5f06f5157 *./data/b-libav.rm
+5275686385346789108ec4fdf06ecef8 *./data/b-libav.rm
 360269 ./data/b-libav.rm
 90784a1b9589095f20fc6bcc0cc23cc4 *./data/b-libav.mpg
  387072 ./data/b-libav.mpg
diff --git a/tests/rotozoom.regression.ref b/tests/rotozoom.regression.ref
index 65dc8c30c2..725ea6d7c5 100644
--- a/tests/rotozoom.regression.ref
+++ b/tests/rotozoom.regression.ref
@@ -150,7 +150,7 @@ stddev:  3.44 PSNR:37.38 bytes:7602176
 6956f2c5185c4edbae648c614992a14b *./data/out.wav
 stddev:9330.70 PSNR:16.92 bytes:527360
 stddev:4396.13 PSNR:23.46 bytes:526336
-4292b4f8e930e386e9c00799197615e5 *./data/a-ac3.rm
+aefe11ab5067621a1c674859d6413891 *./data/a-ac3.rm
 98203 ./data/a-ac3.rm
 9e6e66847a568ef4f1f229b0939d2aae *./data/a-g726.wav
 24268 ./data/a-g726.wav