diff --git a/net/rds/send.c b/net/rds/send.c
index 028ab598ac1b7b7bd1f6b2d9659d1ef7d071b7c9..79d158b3def0fa16ef3d9048884b152a45c87fff 100644
--- a/net/rds/send.c
+++ b/net/rds/send.c
@@ -902,6 +902,8 @@ static int rds_rm_size(struct msghdr *msg, int num_sgs)
 
 		case RDS_CMSG_ZCOPY_COOKIE:
 			zcopy_cookie = true;
+			/* fall through */
+
 		case RDS_CMSG_RDMA_DEST:
 		case RDS_CMSG_RDMA_MAP:
 			cmsg_groups |= 2;