diff --git a/src/mod/endpoints/mod_portaudio/mod_portaudio.c b/src/mod/endpoints/mod_portaudio/mod_portaudio.c
index bc4c19b614..04a3011d72 100644
--- a/src/mod/endpoints/mod_portaudio/mod_portaudio.c
+++ b/src/mod/endpoints/mod_portaudio/mod_portaudio.c
@@ -1324,7 +1324,6 @@ SWITCH_MODULE_LOAD_FUNCTION(mod_portaudio_load)
 	globals.read_frame.buflen = sizeof(globals.databuf);
 	globals.cng_frame.data = globals.cngbuf;
 	globals.cng_frame.buflen = sizeof(globals.cngbuf);
-	globals.cng_frame.datalen = switch_samples_per_packet(globals.sample_rate, globals.codec_ms) * 2;
 	switch_set_flag((&globals.cng_frame), SFF_CNG);
 	globals.flags = GFLAG_EAR | GFLAG_MOUTH;
 	/* dual streams makes portaudio on solaris choke */
@@ -1750,6 +1749,8 @@ static switch_status_t load_config(void)
 		globals.codec_ms = 20;
 	}
 
+	globals.cng_frame.datalen = switch_samples_per_packet(globals.sample_rate, globals.codec_ms) * 2;
+
 	if (!globals.ring_interval) {
 		globals.ring_interval = 5;
 	}