diff --git a/coreapi/callbacks.c b/coreapi/callbacks.c
index 6302d92f6..da809bc05 100644
--- a/coreapi/callbacks.c
+++ b/coreapi/callbacks.c
@@ -256,7 +256,9 @@ static void call_terminated(SalOp *op, const char *from) {
 }
 
 static void call_failure(SalOp *op) {
-	std::shared_ptr<LinphonePrivate::CallSession> session = reinterpret_cast<LinphonePrivate::CallSession *>(op->get_user_pointer())->getSharedFromThis();
+	shared_ptr<LinphonePrivate::CallSession> session;
+	if (op->get_user_pointer())
+		session = reinterpret_cast<LinphonePrivate::CallSession *>(op->get_user_pointer())->getSharedFromThis();
 	if (!session) {
 		ms_warning("Failure reported on already terminated CallSession");
 		return;