diff --git a/net/sunrpc/xprtrdma/rpc_rdma.c b/net/sunrpc/xprtrdma/rpc_rdma.c
index 0287734f126f..aec0113a88b0 100644
--- a/net/sunrpc/xprtrdma/rpc_rdma.c
+++ b/net/sunrpc/xprtrdma/rpc_rdma.c
@@ -75,7 +75,7 @@ static unsigned int rpcrdma_max_call_header_size(unsigned int maxsegs)
 
 	/* Maximum Read list size */
 	maxsegs += 2;	/* segment for head and tail buffers */
-	size = maxsegs * sizeof(struct rpcrdma_read_chunk);
+	size += maxsegs * sizeof(struct rpcrdma_read_chunk);
 
 	/* Minimal Read chunk size */
 	size += sizeof(__be32);	/* segment count */
@@ -101,7 +101,7 @@ static unsigned int rpcrdma_max_reply_header_size(unsigned int maxsegs)
 
 	/* Maximum Write list size */
 	maxsegs += 2;	/* segment for head and tail buffers */
-	size = sizeof(__be32);		/* segment count */
+	size += sizeof(__be32);		/* segment count */
 	size += maxsegs * sizeof(struct rpcrdma_segment);
 	size += sizeof(__be32);	/* list discriminator */