diff --git a/src/switch_core_io.c b/src/switch_core_io.c
index a36d55776b..e27bf86d0f 100644
--- a/src/switch_core_io.c
+++ b/src/switch_core_io.c
@@ -1435,7 +1435,7 @@ SWITCH_DECLARE(switch_status_t) switch_core_session_send_dtmf_string(switch_core
 		dur = switch_core_default_dtmf_duration(0) / 8;
 		if ((p = strchr(argv[i], '@'))) {
 			*p++ = '\0';
-			if ((dur = atoi(p)) > 50) {
+			if ((dur = atoi(p)) > (int)switch_core_min_dtmf_duration(0) / 8) {
 				dtmf.duration = dur * 8;
 			}
 		}
@@ -1444,7 +1444,7 @@ SWITCH_DECLARE(switch_status_t) switch_core_session_send_dtmf_string(switch_core
 		for (p = argv[i]; p && *p; p++) {
 			if (is_dtmf(*p)) {
 				dtmf.digit = *p;
-
+				
 				if (dtmf.duration > switch_core_max_dtmf_duration(0)) {
 					switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_WARNING, "%s EXCESSIVE DTMF DIGIT [%c] LEN [%d]\n",
 									  switch_channel_get_name(session->channel), dtmf.digit, dtmf.duration);