diff -urNad cups-1.2~/cups/http-addr.c cups-1.2/cups/http-addr.c
--- cups-1.2~/cups/http-addr.c	2006-03-08 19:34:07.000000000 +0100
+++ cups-1.2/cups/http-addr.c	2006-04-13 13:07:32.000000000 +0200
@@ -510,7 +510,7 @@
 
   if (http)
   {
-    if (http->hostname[0] == '/')
+    if (!http->hostname || http->hostname[0] == '/')
       strlcpy(s, "localhost", slen);
     else
       strlcpy(s, http->hostname, slen);
@@ -521,9 +521,16 @@
     * Get the hostname...
     */
 
-    gethostname(s, slen);
+    if (gethostname(s, slen) != 0)
+    {
+	/*
+	 * Fall back to localhost on failure
+	 */
+	strlcpy(s, "localhost", slen);
+	return (s);
+    }
 
     if (!strchr(s, '.'))
     {