Index: asterisk-trunk/channels/sig_pri.c
===================================================================
--- asterisk-trunk.orig/channels/sig_pri.c	2009-07-30 13:20:55.000000000 +0300
+++ asterisk-trunk/channels/sig_pri.c	2009-07-30 13:21:05.000000000 +0300
@@ -2465,6 +2465,7 @@
 	return res;
 }
 
+#ifdef HAVE_PRI_SERVICE_MESSAGES
 int pri_maintenance_bservice(struct pri *pri, struct sig_pri_chan *p, int changestatus)
 {
 	int channel = PVT_TO_CHANNEL(p);
@@ -2472,5 +2473,6 @@
 
 	return pri_maintenance_service(pri, span, channel, changestatus);
 }
+#endif
 
 #endif /* HAVE_PRI */