diff --git a/sys/netinet/in.c b/sys/netinet/in.c
index db087b28d4c..edff895df98 100644
--- a/sys/netinet/in.c
+++ b/sys/netinet/in.c
@@ -129,10 +129,10 @@ static struct sx in_control_sx;
 SX_SYSINIT(in_control_sx, &in_control_sx, "in_control");
 
 /*
- * Return 1 if an internet address is for a ``local'' host
+ * Return true if an internet address is for a ``local'' host
  * (one to which we have a connection).
  */
-int
+bool
 in_localaddr(struct in_addr in)
 {
 	u_long i = ntohl(in.s_addr);
@@ -142,10 +142,10 @@ in_localaddr(struct in_addr in)
 
 	CK_STAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) {
 		if ((i & ia->ia_subnetmask) == ia->ia_subnet)
-			return (1);
+			return (true);
 	}
 
-	return (0);
+	return (false);
 }
 
 /*
diff --git a/sys/netinet/in.h b/sys/netinet/in.h
index 80c872367f9..db36962aadb 100644
--- a/sys/netinet/in.h
+++ b/sys/netinet/in.h
@@ -677,7 +677,7 @@ struct in_ifaddr;
 int	 in_broadcast(struct in_addr, struct ifnet *);
 int	 in_ifaddr_broadcast(struct in_addr, struct in_ifaddr *);
 int	 in_canforward(struct in_addr);
-int	 in_localaddr(struct in_addr);
+bool	 in_localaddr(struct in_addr);
 bool	 in_localip(struct in_addr);
 bool	 in_localip_fib(struct in_addr, uint16_t);
 int	 in_ifhasaddr(struct ifnet *, struct in_addr);