1 files changed, 6 insertions, 4 deletions

diff --git a/src/lib/libc/net/ethers.c b/src/lib/libc/net/ethers.c
index aa2d99c0a3..d7b0b32f13 100644
--- a/src/lib/libc/net/ethers.c
+++ b/src/lib/libc/net/ethers.c
@@ -1,4 +1,4 @@
-/*      $OpenBSD: ethers.c,v 1.5 1998/03/17 06:16:55 millert Exp $      */
+/*      $OpenBSD: ethers.c,v 1.6 1998/03/17 06:20:25 millert Exp $      */
 
 /*
  * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
@@ -37,7 +37,7 @@
  */
 
 #if defined(LIBC_SCCS) && !defined(lint)
-static char rcsid[] = "$OpenBSD: ethers.c,v 1.5 1998/03/17 06:16:55 millert Exp $";
+static char rcsid[] = "$OpenBSD: ethers.c,v 1.6 1998/03/17 06:20:25 millert Exp $";
 #endif /* LIBC_SCCS and not lint */
 
 #include <sys/types.h>
@@ -126,8 +126,10 @@ ether_ntohost(hostname, e)
 
         if (e->ether_addr_octet[0] > 0xFF || e->ether_addr_octet[1] > 0xFF ||
             e->ether_addr_octet[2] > 0xFF || e->ether_addr_octet[3] > 0xFF ||
-            e->ether_addr_octet[4] > 0xFF || e->ether_addr_octet[5] > 0xFF)
-                return (NULL);
+            e->ether_addr_octet[4] > 0xFF || e->ether_addr_octet[5] > 0xFF) {
+                errno = EINVAL;
+                return (-1);
+        }
 
 #ifdef YP
         char trybuf[sizeof("xx:xx:xx:xx:xx:xx")];