diff --git a/coreapi/linphonecore.c b/coreapi/linphonecore.c
index acdae7b48..021659490 100644
--- a/coreapi/linphonecore.c
+++ b/coreapi/linphonecore.c
@@ -5105,7 +5105,8 @@ void linphone_core_enable_mic(LinphoneCore *lc, bool_t enable) {
 	for (elem = list; elem != NULL; elem = elem->next) {
 		call = (LinphoneCall *)elem->data;
 		call->audio_muted = !enable;
-		linphone_core_mute_audio_stream(lc, call->audiostream, !enable);
+        if (call->audiostream)
+		    linphone_core_mute_audio_stream(lc, call->audiostream, enable);
 	}
 }