diff --git a/libavcodec/alsdec.c b/libavcodec/alsdec.c
index 625d111c05..e5208fc2bf 100644
--- a/libavcodec/alsdec.c
+++ b/libavcodec/alsdec.c
@@ -651,7 +651,7 @@ static int read_var_block_data(ALSDecContext *ctx, ALSBlockData *bd)
         for (k = 1; k < sub_blocks; k++)
             s[k] = s[k - 1] + decode_rice(gb, 0);
     }
-    for (k = 1; k < sub_blocks; k++)
+    for (k = 0; k < sub_blocks; k++)
         if (s[k] > 32) {
             av_log(avctx, AV_LOG_ERROR, "k invalid for rice code.\n");
             return -1;