diff --git a/libavcodec/ac3enc.c b/libavcodec/ac3enc.c
index 623541d23b..358f4e174d 100644
--- a/libavcodec/ac3enc.c
+++ b/libavcodec/ac3enc.c
@@ -1161,7 +1161,7 @@ static int AC3_encode_frame(AVCodecContext *avctx,
             v = 14 - log2_tab(input_samples, N);
             if (v < 0)
                 v = 0;
-            exp_samples[i][ch] = v - 10;
+            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 b599a08c8d..29d3ffe10f 100644
--- a/tests/ffmpeg.regression.ref
+++ b/tests/ffmpeg.regression.ref
@@ -166,7 +166,7 @@ stddev: 10.98 PSNR:27.30 bytes:7602176
 83f8df5d5f84480566af548bb037fceb *./data/out.wav
 stddev:9330.70 PSNR:16.92 bytes:1054720
 stddev:4396.13 PSNR:23.46 bytes:1052672
-dd68110cb7e5388392f89d5160d3a825 *./data/a-ac3.rm
+aefe11ab5067621a1c674859d6413891 *./data/a-ac3.rm
 98203 ./data/a-ac3.rm
 1eea0440091a8f898c9efca99141456e *./data/a-g726.wav
 24280 ./data/a-g726.wav
diff --git a/tests/libav.regression.ref b/tests/libav.regression.ref
index 6c245658b5..4ae54b737d 100644
--- a/tests/libav.regression.ref
+++ b/tests/libav.regression.ref
@@ -5,7 +5,7 @@ ffmpeg regression test
 786446e80ead936e5faa8f5908f19281 *./data/b-libav.asf
 339775 ./data/b-libav.asf
 ./data/b-libav.asf CRC=0x74113749
-1ad618e9fd318eb3483270cf9b9b3f43 *./data/b-libav.rm
+1ce78eeb6881ffe5b649a9b5105de919 *./data/b-libav.rm
 355405 ./data/b-libav.rm
 bdb7484c68db722f66ba1630cf79844c *./data/b-libav.mpg
 378880 ./data/b-libav.mpg
diff --git a/tests/rotozoom.regression.ref b/tests/rotozoom.regression.ref
index 897d9266a0..5929f7abee 100644
--- a/tests/rotozoom.regression.ref
+++ b/tests/rotozoom.regression.ref
@@ -166,7 +166,7 @@ stddev:  3.44 PSNR:37.39 bytes:7602176
 83f8df5d5f84480566af548bb037fceb *./data/out.wav
 stddev:9330.70 PSNR:16.92 bytes:1054720
 stddev:4396.13 PSNR:23.46 bytes:1052672
-dd68110cb7e5388392f89d5160d3a825 *./data/a-ac3.rm
+aefe11ab5067621a1c674859d6413891 *./data/a-ac3.rm
 98203 ./data/a-ac3.rm
 1eea0440091a8f898c9efca99141456e *./data/a-g726.wav
 24280 ./data/a-g726.wav