1diff --git a/third_party/libopenjpeg20/j2k.c b/third_party/libopenjpeg20/j2k.c
2index 9056feb..c7aa8db 100644
3--- a/third_party/libopenjpeg20/j2k.c
4+++ b/third_party/libopenjpeg20/j2k.c
5@@ -8744,7 +8744,9 @@ static OPJ_BOOL opj_j2k_read_SPCod_SPCoc(  opj_j2k_t *p_j2k,
6                                 p_j2k->m_specific_param.m_decoder.m_default_tcp;
7
8         /* precondition again */
9-        assert(compno < p_j2k->m_private_image->numcomps);
10+        if (compno >= p_j2k->m_private_image->numcomps) {
11+                return OPJ_FALSE;
12+        }
13
14         l_tccp = &l_tcp->tccps[compno];
15         l_current_ptr = p_header_data;
16