--- include/igmp.h-	Tue Jan 11 14:30:14 2000
+++ include/igmp.h	Tue Jan 11 14:31:24 2000
@@ -46,7 +46,9 @@
 
 #ifdef HAVE_IPV6
 #ifdef WIDE_IPV6
+#ifdef HAVE_MROUTING6
 #include <netinet6/ip6_mroute.h>
+#endif /* HAVE_MROUTING6 */
 #endif /* WIDE_IPV6 */
 #ifndef sun
 #include <netinet/ip6.h>