diff --git a/sys/rpc/rpcclnt.c b/sys/rpc/rpcclnt.c
index 4f61f29cb94..a0ae12ced44 100644
--- a/sys/rpc/rpcclnt.c
+++ b/sys/rpc/rpcclnt.c
@@ -837,8 +837,8 @@ tryagain:
 			if (!error && auio.uio_resid > 0) {
 				log(LOG_INFO,
 				"short receive (%d/%d) from rpc server %s\n",
-				    sizeof(u_int32_t) - auio.uio_resid,
-				    sizeof(u_int32_t),
+				    (int) sizeof(u_int32_t) - auio.uio_resid,
+				    (int) sizeof(u_int32_t),
 				    rep->r_rpcclnt->rc_prog->prog_name);
 				error = EPIPE;
 			}