diff --git a/libavcodec/alsdec.c b/libavcodec/alsdec.c
index 60dd8161e8..69e66d6f7f 100644
--- a/libavcodec/alsdec.c
+++ b/libavcodec/alsdec.c
@@ -1175,14 +1175,14 @@ static int read_channel_data(ALSDecContext *ctx, ALSChannelData *cd, int c)
 
         if (current->master_channel != c) {
             current->time_diff_flag = get_bits1(gb);
-            current->weighting[0]   = mcc_weightings[av_clip(decode_rice(gb, 1) + 16, 0, 32)];
-            current->weighting[1]   = mcc_weightings[av_clip(decode_rice(gb, 2) + 14, 0, 32)];
-            current->weighting[2]   = mcc_weightings[av_clip(decode_rice(gb, 1) + 16, 0, 32)];
+            current->weighting[0]   = mcc_weightings[av_clip(decode_rice(gb, 1) + 16, 0, 31)];
+            current->weighting[1]   = mcc_weightings[av_clip(decode_rice(gb, 2) + 14, 0, 31)];
+            current->weighting[2]   = mcc_weightings[av_clip(decode_rice(gb, 1) + 16, 0, 31)];
 
             if (current->time_diff_flag) {
-                current->weighting[3] = mcc_weightings[av_clip(decode_rice(gb, 1) + 16, 0, 32)];
-                current->weighting[4] = mcc_weightings[av_clip(decode_rice(gb, 1) + 16, 0, 32)];
-                current->weighting[5] = mcc_weightings[av_clip(decode_rice(gb, 1) + 16, 0, 32)];
+                current->weighting[3] = mcc_weightings[av_clip(decode_rice(gb, 1) + 16, 0, 31)];
+                current->weighting[4] = mcc_weightings[av_clip(decode_rice(gb, 1) + 16, 0, 31)];
+                current->weighting[5] = mcc_weightings[av_clip(decode_rice(gb, 1) + 16, 0, 31)];
 
                 current->time_diff_sign  = get_bits1(gb);
                 current->time_diff_index = get_bits(gb, ctx->ltp_lag_length - 3) + 3;