diff --git a/Classes/LinphoneManager.m b/Classes/LinphoneManager.m
index 5d5a539f3..78593018e 100644
--- a/Classes/LinphoneManager.m
+++ b/Classes/LinphoneManager.m
@@ -1672,7 +1672,7 @@ static int comp_call_state_paused(const LinphoneCall *call, const void *param) {
 
 	// handle proxy config if any
 	if (proxyCfg) {
-		const char *refkey = linphone_proxy_config_get_ref_key(proxyCfg);
+		const char *refkey = proxyCfg ? linphone_proxy_config_get_ref_key(proxyCfg) : NULL;
 		BOOL pushNotifEnabled = (refkey && strcmp(refkey, "push_notification") == 0);
 		if ([LinphoneManager.instance lpConfigBoolForKey:@"backgroundmode_preference"] || pushNotifEnabled) {
 			// For registration register