--- gated-3-5-8/src/krt.c.glibc	Thu Jan  8 20:22:08 1998
+++ gated-3-5-8/src/krt.c	Thu Jan  8 20:31:20 1998
@@ -813,7 +813,8 @@
     if (BIT_TEST(k_flags, IFF_POINTOPOINT)) {
 	BIT_SET(state, IFS_POINTOPOINT);
     }
-#ifdef	IFF_LOOPBACK
+#if defined(IFF_LOOPBACK) || defined(__GLIBC__)  /* on glibc-based systems this is an
+						  * enum value rather than a #define */
     if (BIT_TEST(k_flags, IFF_LOOPBACK)) {
 	BIT_SET(state, IFS_LOOPBACK);
 #ifdef	_IBMR2
@@ -826,13 +827,13 @@
     }
 #endif	/* IFF_LOOPBACK */
 
-#ifdef	IFF_MULTICAST
+#if defined(IFF_MULTICAST) || defined(__GLIBC__)
     if (BIT_TEST(k_flags, IFF_MULTICAST)) {
 	BIT_SET(state, IFS_MULTICAST);
     }
 #endif	/* IFF_MULTICAST */
 
-#ifdef	IFF_ALLMULTI
+#if defined(IFF_ALLMULTI) || defined(__GLIBC__)
     if (BIT_TEST(k_flags, IFF_ALLMULTI)) {
 	BIT_SET(state, IFS_ALLMULTI);
     }