diff -Naur libpri/libpri.h libpri-patched/libpri.h
--- libpri/libpri.h	2005-05-23 18:51:30.000000000 +0200
+++ libpri-patched/libpri.h	2005-06-15 13:14:07.000000000 +0200
@@ -339,6 +339,7 @@
 typedef struct pri_event_proceeding {
 	int e;
 	int channel;
+	int cause;
 	int cref;
 	int progress;
 	int progressmask;
diff -Naur libpri/q931.c libpri-patched/q931.c
--- libpri/q931.c	2005-05-29 17:08:23.000000000 +0200
+++ libpri-patched/q931.c	2005-06-15 13:16:52.000000000 +0200
@@ -3176,6 +3176,7 @@
 	case Q931_CONNECT:
 	case Q931_ALERTING:
 	case Q931_PROGRESS:
+		c->cause = -1;
 	case Q931_CALL_PROCEEDING:
 		c->progress = -1;
 		c->progressmask = 0;
@@ -3448,6 +3449,7 @@
 			q931_destroycall(pri, c->cr);
 			break;
 		}
+		pri->ev.proceeding.cause = c->cause;
 		pri->ev.e = PRI_EVENT_PROGRESS;
 		/* Fall through */
 	case Q931_CALL_PROCEEDING: