1 files changed, 2 insertions, 2 deletions

diff --git a/include/linux/igmp.h b/include/linux/igmp.h
index 03f43e2893a4..6e7ea2f0a57c 100644
--- a/include/linux/igmp.h
+++ b/include/linux/igmp.h
@@ -30,7 +30,7 @@ struct igmphdr
 {
         __u8 type;
         __u8 code;              /* For newer IGMP */
-        __be16 csum;
+        __sum16 csum;
         __be32 group;
 };
 
@@ -191,7 +191,7 @@ struct ip_mc_list
 #define IGMPV3_MASK(value, nb) ((nb)>=32 ? (value) : ((1<<(nb))-1) & (value))
 #define IGMPV3_EXP(thresh, nbmant, nbexp, value) \
         ((value) < (thresh) ? (value) : \
-        ((IGMPV3_MASK(value, nbmant) | (1<<(nbmant+nbexp))) << \
+        ((IGMPV3_MASK(value, nbmant) | (1<<(nbmant))) << \
          (IGMPV3_MASK((value) >> (nbmant), nbexp) + (nbexp))))
 
 #define IGMPV3_QQIC(value) IGMPV3_EXP(0x80, 4, 3, value)