diff --git a/libpri.h b/libpri.h
index 62ad699..d9e0d8f 100755
--- a/libpri.h
+++ b/libpri.h
@@ -393,4 +393,8 @@ extern void pri_dump_info(struct pri *pri);
 /* Get file descriptor */
 extern int pri_fd(struct pri *pri);
 
+#define PRI_PROGRESS
+/* Send call proceeding */
+extern int pri_progress(struct pri *pri, q931_call *c);
+
 #endif
diff --git a/pri.c b/pri.c
index c80bf88..8811d7c 100755
--- a/pri.c
+++ b/pri.c
@@ -191,6 +191,13 @@ int pri_acknowledge(struct pri *pri, q931_call *call, int channel, int info)
 	return q931_alerting(pri, call, channel, info);
 }
 
+int pri_progress(struct pri *pri, q931_call *call)
+{
+	if (!pri || !call)
+		return -1;
+	return q931_call_proceeding(pri, call);
+}
+
 int pri_information(struct pri *pri, q931_call *call, char digit)
 {
 	if (!pri || !call)