1 files changed, 4 insertions, 1 deletions

diff --git a/include/net/mld.h b/include/net/mld.h
index faa1d161bf24..01d751303498 100644
--- a/include/net/mld.h
+++ b/include/net/mld.h
@@ -88,12 +88,15 @@ struct mld2_query {
 #define MLDV2_QQIC_EXP(value)   (((value) >> 4) & 0x07)
 #define MLDV2_QQIC_MAN(value)   ((value) & 0x0f)
 
+#define MLD_EXP_MIN_LIMIT       32768UL
+#define MLDV1_MRD_MAX_COMPAT    (MLD_EXP_MIN_LIMIT - 1)
+
 static inline unsigned long mldv2_mrc(const struct mld2_query *mlh2)
 {
         /* RFC3810, 5.1.3. Maximum Response Code */
         unsigned long ret, mc_mrc = ntohs(mlh2->mld2q_mrc);
 
-        if (mc_mrc < 32768) {
+        if (mc_mrc < MLD_EXP_MIN_LIMIT) {
                 ret = mc_mrc;
         } else {
                 unsigned long mc_man, mc_exp;