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diff --git a/engines/sword25/util/lua_persistence_util.h b/engines/sword25/util/lua_persistence_util.h
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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * 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 distri8buted 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.
+ *
+ */
+
+/**
+ * This code is heavily based on the Pluto code base. Copyright below
+ */
+
+/* Tamed Pluto - Heavy-duty persistence for Lua
+ * Copyright (C) 2004 by Ben Sunshine-Hill, and released into the public
+ * domain. People making use of this software as part of an application
+ * are politely requested to email the author at sneftel@gmail.com
+ * with a brief description of the application, primarily to satisfy his
+ * curiosity.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Instrumented by Stefan Reich (info@luaos.net)
+ * for Mobile Lua (http://luaos.net/pages/mobile-lua.php)
+ */
+
+
+#ifndef LUA_PERISTENCE_UTIL_H
+#define LUA_PERISTENCE_UTIL_H
+
+
+struct lua_State;
+
+#include "lua/lobject.h"
+
+typedef TValue *StkId;
+
+namespace Lua {
+
+#define lua_malloc(luaState, nsize) lua_realloc(luaState, nullptr, 0, nsize)
+#define lua_reallocv(luaState, block, on, n, e) lua_realloc(luaState, block, (on) * (e), (n) * (e))
+#define lua_reallocvector(luaState, vec, oldn, n, T) ((vec) = (T *)(lua_reallocv(luaState, vec, oldn, n, sizeof(T))))
+#define lua_newVector(luaState, num, T) ((T *)lua_reallocv(luaState, nullptr, 0, num, sizeof(T)))
+#define lua_new(luaState,T) (T *)lua_malloc(luaState, sizeof(T))
+
+void *lua_realloc(lua_State *luaState, void *block, size_t osize, size_t nsize);
+
+void pushObject(lua_State *luaState, TValue *obj);
+void pushProto(lua_State *luaState, Proto *proto);
+void pushUpValue(lua_State *luaState, UpVal *upval);
+void pushString(lua_State *luaState, TString *str);
+
+StkId getObject(lua_State *luaState, int stackpos);
+
+void lua_linkObjToGC(lua_State *luaState, GCObject *obj, lu_byte type);
+
+#define sizeLclosure(n) ((sizeof(LClosure)) + sizeof(TValue *) * ((n) - 1))
+
+Closure *lua_newLclosure(lua_State *luaState, int numElements, Table *elementTable);
+void pushClosure(lua_State *luaState, Closure *closure);
+
+Proto *createProto(lua_State *luaState);
+Proto *makeFakeProto(lua_State *L, lu_byte nups);
+
+TString *createString(lua_State *luaState, const char *str, size_t len);
+
+UpVal *createUpValue(lua_State *luaState, int stackpos);
+void unboxUpValue(lua_State *luaState);
+
+/* Appends one stack to another stack, but the stack is reversed in the process */
+size_t appendStackToStack_reverse(lua_State *from, lua_State *to);
+void correctStack(lua_State *L, TValue *oldstack);
+void lua_reallocstack(lua_State *L, int newsize);
+void lua_growstack(lua_State *L, int n);
+
+void lua_reallocCallInfo(lua_State *lauState, int newsize);
+
+/* Does basically the opposite of luaC_link().
+ * Right now this function is rather inefficient; it requires traversing the
+ * entire root GC set in order to find one object. If the GC list were doubly
+ * linked this would be much easier, but there's no reason for Lua to have
+ * that. */
+void GCUnlink(lua_State *luaState, GCObject *gco);
+
+TString *lua_newlstr(lua_State *luaState, const char *str, size_t len);
+void lua_link(lua_State *luaState, GCObject *o, lu_byte tt);
+Proto *lua_newproto(lua_State *luaState) ;
+
+UpVal *makeUpValue(lua_State *luaState, int stackPos);
+/**
+ * The GC is not fond of finding upvalues in tables. We get around this
+ * during persistence using a weakly keyed table, so that the GC doesn't
+ * bother to mark them. This won't work in unpersisting, however, since
+ * if we make the values weak they'll be collected (since nothing else
+ * references them). Our solution, during unpersisting, is to represent
+ * upvalues as dummy functions, each with one upvalue.
+ */
+void boxUpValue_start(lua_State *luaState);
+void boxUpValue_finish(lua_State *luaState);
+
+} // End of namespace Lua
+
+#endif