diff --git a/lib/libc/net/gethostbydns.c b/lib/libc/net/gethostbydns.c
index 1077bb8aff09..bd4d02dfe714 100644
--- a/lib/libc/net/gethostbydns.c
+++ b/lib/libc/net/gethostbydns.c
@@ -532,7 +532,7 @@ _dns_gethostbyaddr(void *rval, void *cb_data, va_list ap)
 	struct hostent *rhe;
 	char **haddr;
 	u_long old_options;
-	char hname2[MAXDNAME+1];
+	char hname2[MAXDNAME+1], numaddr[46];
 #endif /*SUNSECURITY*/
 
 	addr = va_arg(ap, const char *);
@@ -625,9 +625,11 @@ _dns_gethostbyaddr(void *rval, void *cb_data, va_list ap)
 	    _res.options |= RES_DEFNAMES;
 	    memset(&rhd, 0, sizeof rhd);
 	    if (!(rhe = gethostbyname_r(hname2, &rhd.host, &rhd.data))) {
+		if (inet_ntop(af, addr, numaddr, sizeof(numaddr)) == NULL)
+		    strlcpy(numaddr, "UNKNOWN", sizeof(numaddr));
 		syslog(LOG_NOTICE|LOG_AUTH,
 		       "gethostbyaddr: No A record for %s (verifying [%s])",
-		       hname2, inet_ntoa(*((struct in_addr *)addr)));
+		       hname2, numaddr);
 		_res.options = old_options;
 		h_errno = HOST_NOT_FOUND;
 		return NS_NOTFOUND;
@@ -637,9 +639,11 @@ _dns_gethostbyaddr(void *rval, void *cb_data, va_list ap)
 		if (!memcmp(*haddr, addr, INADDRSZ))
 			break;
 	    if (!*haddr) {
+		if (inet_ntop(af, addr, numaddr, sizeof(numaddr)) == NULL)
+		    strlcpy(numaddr, "UNKNOWN", sizeof(numaddr));
 		syslog(LOG_NOTICE|LOG_AUTH,
 		       "gethostbyaddr: A record of %s != PTR record [%s]",
-		       hname2, inet_ntoa(*((struct in_addr *)addr)));
+		       hname2, numaddr);
 		h_errno = HOST_NOT_FOUND;
 		return NS_NOTFOUND;
 	    }
diff --git a/lib/libc/net/gethostbynis.c b/lib/libc/net/gethostbynis.c
index 386b31259bf9..e9cc2053fb28 100644
--- a/lib/libc/net/gethostbynis.c
+++ b/lib/libc/net/gethostbynis.c
@@ -171,6 +171,7 @@ _gethostbynisaddr_r(const char *addr, int len, int af, struct hostent *he,
     struct hostent_data *hed)
 {
 	char *map;
+	char numaddr[46];
 
 	switch (af) {
 	case AF_INET:
@@ -180,8 +181,9 @@ _gethostbynisaddr_r(const char *addr, int len, int af, struct hostent *he,
 		map = "ipnodes.byaddr";
 		break;
 	}
-	return _gethostbynis(inet_ntoa(*(struct in_addr *)addr), map, af, he,
-	    hed);
+	if (inet_ntop(af, addr, numaddr, sizeof(numaddr)) == NULL)
+		return -1;
+	return _gethostbynis(numaddr, map, af, he, hed);
 }
 #endif /* YP */