diff --git a/pjsip/include/pjsua-lib/pjsua.h b/pjsip/include/pjsua-lib/pjsua.h
index e6f6e2d..33deb38 100644
--- a/pjsip/include/pjsua-lib/pjsua.h
+++ b/pjsip/include/pjsua-lib/pjsua.h
@@ -3749,6 +3749,12 @@
     unsigned		snd_clock_rate;
 
     /**
+     * Channel count be applied when opening the sound device and
+     * conference bridge.
+     */
+    unsigned		channel_count;
+
+    /**
      * Specify audio frame ptime. The value here will affect the 
      * samples per frame of both the sound device and the conference
      * bridge. Specifying lower ptime will normally reduce the