diff --git a/libavcodec/vp6.c b/libavcodec/vp6.c
index c1ca2273b142792af2ff7dcc6c73c9deafaddf09..de98e61e6e558944510107f730d80e392a15c6de 100644
--- a/libavcodec/vp6.c
+++ b/libavcodec/vp6.c
@@ -372,6 +372,8 @@ static void vp6_parse_coeff_huffman(VP56Context *s)
                 if (coeff_idx)
                     break;
             } else {
+                if (get_bits_count(&s->gb) >= s->gb.size_in_bits)
+                    return;
                 coeff = get_vlc2(&s->gb, vlc_coeff->table, 9, 3);
                 if (coeff == 0) {
                     if (coeff_idx) {