diff --git a/libpri.h b/libpri.h
index 06b306c..d699fe0 100644
--- a/libpri.h
+++ b/libpri.h
@@ -361,6 +361,7 @@ typedef struct pri_event_proceeding {
 typedef struct pri_event_setup_ack {
 	int e;
 	int channel;
+	q931_call *call;
 } pri_event_setup_ack;
 
 typedef struct pri_event_notify {
diff --git a/q931.c b/q931.c
index 0d89c83..afd7d06 100644
--- a/q931.c
+++ b/q931.c
@@ -3573,6 +3573,7 @@ int q931_receive(struct pri *pri, q931_h *h, int len)
 		c->peercallstate = Q931_CALL_STATE_OVERLAP_RECEIVING;
 		pri->ev.e = PRI_EVENT_SETUP_ACK;
 		pri->ev.setup_ack.channel = c->channelno | (c->ds1no << 8) | (c->ds1explicit << 16);
+		pri->ev.setup_ack.call = c;
 
 		cur = c->apdus;
 		while (cur) {