diff --git a/coreapi/linphonecore.c b/coreapi/linphonecore.c
index 6f459b2be..f99cb9c29 100644
--- a/coreapi/linphonecore.c
+++ b/coreapi/linphonecore.c
@@ -4583,7 +4583,7 @@ void linphone_core_start_dtmf_stream(LinphoneCore* lc) {
 }
 
 void linphone_core_stop_dtmf_stream(LinphoneCore* lc) {
-	if (lc->ringstream && dmfs_playing_start_time!=0) {
+	if (lc->ringstream && lc->dmfs_playing_start_time!=0) {
 		ring_stop(lc->ringstream);
 		lc->ringstream=NULL;
 	}