diff --git a/third_party/libopenjpeg20/j2k.c b/third_party/libopenjpeg20/j2k.c
index 6346c2190..d4dd65827 100644
--- a/third_party/libopenjpeg20/j2k.c
+++ b/third_party/libopenjpeg20/j2k.c
@@ -5170,10 +5170,11 @@ static OPJ_BOOL opj_j2k_read_mct (      opj_j2k_t *p_j2k,
                 ++l_mct_data;
         }
 
+        opj_mct_data_t *new_mct_records = NULL;
+
         /* NOT FOUND */
         if (i == l_tcp->m_nb_mct_records) {
                 if (l_tcp->m_nb_mct_records == l_tcp->m_nb_max_mct_records) {
-                        opj_mct_data_t *new_mct_records;
                         l_tcp->m_nb_max_mct_records += OPJ_J2K_MCT_DEFAULT_NB_RECORDS;
 
                         new_mct_records = (opj_mct_data_t *) opj_realloc(l_tcp->m_mct_records, l_tcp->m_nb_max_mct_records * sizeof(opj_mct_data_t));
@@ -5191,7 +5192,6 @@ static OPJ_BOOL opj_j2k_read_mct (      opj_j2k_t *p_j2k,
                 }
 
                 l_mct_data = l_tcp->m_mct_records + l_tcp->m_nb_mct_records;
-                ++l_tcp->m_nb_mct_records;
         }
 
         if (l_mct_data->m_data) {
@@ -5221,6 +5221,9 @@ static OPJ_BOOL opj_j2k_read_mct (      opj_j2k_t *p_j2k,
 
         l_mct_data->m_data_size = p_header_size;
 
+        if (new_mct_records) {
+                ++l_tcp->m_nb_mct_records;
+        }
         return OPJ_TRUE;
 }