diff --git a/libavcodec/magicyuv.c b/libavcodec/magicyuv.c
index 5f09c0be53..acb94f57ee 100644
--- a/libavcodec/magicyuv.c
+++ b/libavcodec/magicyuv.c
@@ -97,7 +97,7 @@ static int huff_build10(VLC *vlc, uint8_t *len)
     for (i = 0; i < 1024; i++) {
         he[i].sym = 1023 - i;
         he[i].len = len[i];
-        if (len[i] == 0)
+        if (len[i] == 0 || len[i] > 32)
             return AVERROR_INVALIDDATA;
     }
     AV_QSORT(he, 1024, HuffEntry, huff_cmp_len10);
@@ -129,7 +129,7 @@ static int huff_build(VLC *vlc, uint8_t *len)
     for (i = 0; i < 256; i++) {
         he[i].sym = 255 - i;
         he[i].len = len[i];
-        if (len[i] == 0)
+        if (len[i] == 0 || len[i] > 32)
             return AVERROR_INVALIDDATA;
     }
     AV_QSORT(he, 256, HuffEntry, huff_cmp_len);