diff --git a/src/core/core-p.h b/src/core/core-p.h
new file mode 100644
index 000000000..5ebe4443f
--- /dev/null
+++ b/src/core/core-p.h
@@ -0,0 +1,44 @@
+/*
+ * core-p.h
+ * Copyright (C) 2010-2017 Belledonne Communications SARL
+ *
+ * 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) any later version.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#ifndef _CORE_P_H_
+#define _CORE_P_H_
+
+#include "core.h"
+#include "db/main-db.h"
+#include "object/object-p.h"
+
+// =============================================================================
+
+LINPHONE_BEGIN_NAMESPACE
+
+class CorePrivate : public ObjectPrivate {
+public:
+	MainDb mainDb;
+
+private:
+	std::list<std::shared_ptr<ChatRoom>> chatRooms;
+	std::unordered_map<std::string, std::shared_ptr<ChatRoom>> chatRoomsMap;
+
+	L_DECLARE_PUBLIC(Core);
+};
+
+LINPHONE_END_NAMESPACE
+
+#endif // ifndef _CORE_P_H_