diff --git a/net/sunrpc/xprtrdma/rpc_rdma.c b/net/sunrpc/xprtrdma/rpc_rdma.c
index 3d65a2bccfc7..7f9d8365c932 100644
--- a/net/sunrpc/xprtrdma/rpc_rdma.c
+++ b/net/sunrpc/xprtrdma/rpc_rdma.c
@@ -72,7 +72,7 @@ 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 * rpcrdma_readchunk_maxsz * sizeof(__be32);
+	size += maxsegs * rpcrdma_readchunk_maxsz * sizeof(__be32);
 
 	/* Minimal Read chunk size */
 	size += sizeof(__be32);	/* segment count */
@@ -98,7 +98,7 @@ 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 * rpcrdma_segment_maxsz * sizeof(__be32);
 	size += sizeof(__be32);	/* list discriminator */