1 files changed, 3 insertions, 2 deletions

diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c
index 6110c6d6e613..76c08402c933 100644
--- a/net/ipv4/igmp.c
+++ b/net/ipv4/igmp.c
@@ -1899,8 +1899,9 @@ int ip_mc_source(int add, int omode, struct sock *sk, struct
         err = -EADDRNOTAVAIL;
 
         for (pmc=inet->mc_list; pmc; pmc=pmc->next) {
-                if (pmc->multi.imr_multiaddr.s_addr == imr.imr_multiaddr.s_addr
-                    && pmc->multi.imr_ifindex == imr.imr_ifindex)
+                if ((pmc->multi.imr_multiaddr.s_addr ==
+                     imr.imr_multiaddr.s_addr) &&
+                    (pmc->multi.imr_ifindex == imr.imr_ifindex))
                         break;
         }
         if (!pmc) {             /* must have a prior join */