diff --git a/fuzzer/main_fuzzer.cpp b/fuzzer/main_fuzzer.cpp
index 1e9f088af..e3f03a0ee 100644
--- a/fuzzer/main_fuzzer.cpp
+++ b/fuzzer/main_fuzzer.cpp
@@ -1,48 +1,48 @@
 /***************************************************************************
  *   Copyright (C) 2019 by Nicolas Carion                                  *
  *   This file is part of Kdenlive. See www.kdenlive.org.                  *
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) version 3 or any later version accepted by the       *
  *   membership of KDE e.V. (or its successor approved  by the membership  *
  *   of KDE e.V.), which shall act as a proxy defined in Section 14 of     *
  *   version 3 of the license.                                             *
  *                                                                         *
  *   This program is distributed in the hope that it will be useful,       *
  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  *   GNU General Public License for more details.                          *
  *                                                                         *
  *   You should have received a copy of the GNU General Public License     *
  *   along with this program.  If not, see <http://www.gnu.org/licenses/>. *
  ***************************************************************************/
 
 #include "core.h"
 #include "fuzzing.hpp"
 #include <QApplication>
 #include <cstring>
 #include <iostream>
 #include <mlt++/MltFactory.h>
 #include <mlt++/MltRepository.h>
 
 int argc = 1;
 char *argv[1] = {"fuzz"};
 QApplication app(argc, argv);
 std::unique_ptr<Mlt::Repository> repo(Mlt::Factory::init(nullptr));
 
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
 {
     qputenv("MLT_TESTS", QByteArray("1"));
-    Core::build();
+    Core::build(false);
     const char *input = reinterpret_cast<const char *>(data);
     char *target = new char[size + 1];
     strncpy(target, input, size);
     target[size] = '\0';
     std::string str(target);
     // std::cout<<"Testcase "<<str<<std::endl;
     fuzz(std::string(str));
     delete[] target;
     return 0;
 }
diff --git a/fuzzer/main_reproducer.cpp b/fuzzer/main_reproducer.cpp
index 639fb86b2..ff5cc1e84 100644
--- a/fuzzer/main_reproducer.cpp
+++ b/fuzzer/main_reproducer.cpp
@@ -1,58 +1,58 @@
 /***************************************************************************
  *   Copyright (C) 2019 by Nicolas Carion                                  *
  *   This file is part of Kdenlive. See www.kdenlive.org.                  *
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) version 3 or any later version accepted by the       *
  *   membership of KDE e.V. (or its successor approved  by the membership  *
  *   of KDE e.V.), which shall act as a proxy defined in Section 14 of     *
  *   version 3 of the license.                                             *
  *                                                                         *
  *   This program is distributed in the hope that it will be useful,       *
  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  *   GNU General Public License for more details.                          *
  *                                                                         *
  *   You should have received a copy of the GNU General Public License     *
  *   along with this program.  If not, see <http://www.gnu.org/licenses/>. *
  ***************************************************************************/
 
 #include "core.h"
 #include "fuzzing.hpp"
 #include "logger.hpp"
 #include <QApplication>
 #include <csignal>
 #include <cstring>
 #include <iostream>
 #include <sstream>
 
 void signalHandler(int signum)
 {
     std::cout << "Interrupt signal (" << signum << ") received.\n";
 
     Logger::print_trace();
 
     exit(signum);
 }
 
 int main(int argc, char **argv)
 {
     signal(SIGINT, signalHandler);
     signal(SIGTERM, signalHandler);
     signal(SIGABRT, signalHandler);
     signal(SIGSEGV, signalHandler);
     QApplication app(argc, argv);
     qputenv("MLT_TESTS", QByteArray("1"));
-    Core::build();
+    Core::build(false);
     std::stringstream ss;
     std::string str;
     while (getline(std::cin, str)) {
         ss << str << std::endl;
     }
     std::cout << "executing " << ss.str() << std::endl;
     fuzz(ss.str());
     Logger::print_trace();
     return 0;
 }