diff --git a/lib/printf.c b/lib/printf.c
index 3eb988fa..a1c36129 100644
--- a/lib/printf.c
+++ b/lib/printf.c
@@ -215,7 +215,7 @@ int bvsnprintf(char *buf, int size, const char *fmt, va_list args)
 			if (!(flags & LEFT))
 				while (--field_width > 0)
 					*str++ = ' ';
-			*str++ = (unsigned char) va_arg(args, int);
+			*str++ = (byte) va_arg(args, int);
 			while (--field_width > 0)
 				*str++ = ' ';
 			continue;
diff --git a/nest/route.h b/nest/route.h
index 87f10ae3..2e6bf741 100644
--- a/nest/route.h
+++ b/nest/route.h
@@ -320,7 +320,7 @@ struct mpnh {
   ip_addr gw;				/* Next hop */
   struct iface *iface;			/* Outgoing interface */
   struct mpnh *next;
-  unsigned char weight;
+  byte weight;
 };
 
 struct rte_src {
diff --git a/proto/ospf/rt.c b/proto/ospf/rt.c
index 74d10c7b..e74bcae6 100644
--- a/proto/ospf/rt.c
+++ b/proto/ospf/rt.c
@@ -43,7 +43,7 @@ unresolved_vlink(ort *ort)
 }
 
 static inline struct mpnh *
-new_nexthop(struct ospf_proto *p, ip_addr gw, struct iface *iface, unsigned char weight)
+new_nexthop(struct ospf_proto *p, ip_addr gw, struct iface *iface, byte weight)
 {
   struct mpnh *nh = lp_alloc(p->nhpool, sizeof(struct mpnh));
   nh->gw = gw;
diff --git a/sysdep/bsd/sysio.h b/sysdep/bsd/sysio.h
index df5e0236..c82d7a1e 100644
--- a/sysdep/bsd/sysio.h
+++ b/sysdep/bsd/sysio.h
@@ -130,7 +130,7 @@ static inline void
 sk_process_cmsg4_ttl(sock *s, struct cmsghdr *cm)
 {
   if (cm->cmsg_type == IP_RECVTTL)
-    s->rcv_ttl = * (unsigned char *) CMSG_DATA(cm);
+    s->rcv_ttl = * (byte *) CMSG_DATA(cm);
 }
 
 static inline void