diff --git a/src/switch_ivr_async.c b/src/switch_ivr_async.c
index f22720c1d6..8b56fe6e10 100644
--- a/src/switch_ivr_async.c
+++ b/src/switch_ivr_async.c
@@ -965,7 +965,7 @@ SWITCH_DECLARE(switch_status_t) switch_ivr_stop_inband_dtmf_generate_session(swi
 SWITCH_DECLARE(switch_status_t) switch_ivr_inband_dtmf_generate_session(switch_core_session_t *session, switch_bool_t read_stream)
 {
 	switch_channel_t *channel = switch_core_session_get_channel(session);
-	switch_codec_t *read_codec = switch_core_session_get_read_codec(session);
+	switch_codec_t *read_codec;
 	switch_media_bug_t *bug;
 	switch_status_t status;
 	switch_inband_dtmf_generate_t *pvt;
@@ -975,6 +975,8 @@ SWITCH_DECLARE(switch_status_t) switch_ivr_inband_dtmf_generate_session(switch_c
 		return status;
 	}
 
+	read_codec = switch_core_session_get_read_codec(session);
+
 	if (!read_codec) {
 		switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Can not install inband dtmf generate.  No read codec.!\n");
 		return SWITCH_STATUS_FALSE;