diff --git a/engines/trecision/anim.cpp b/engines/trecision/anim.cpp
index 444820c3fdb..9841df436a9 100644
--- a/engines/trecision/anim.cpp
+++ b/engines/trecision/anim.cpp
@@ -21,6 +21,8 @@
  */
 
 #include "trecision/anim.h"
+
+#include "logic.h"
 #include "trecision/3d.h"
 #include "trecision/dialog.h"
 #include "trecision/scheduler.h"
@@ -232,10 +234,10 @@ void AnimTypeManager::processAtFrame(ATFHandle *h, int type, int atf) {
 		_vm->setObjectVisible(h->_curAnim->_atFrame[atf]._index, !_vm->isObjectVisible(h->_curAnim->_atFrame[atf]._index));
 		break;
 	case ATFSETROOMT:
-		_vm->setRoom(h->_curAnim->_atFrame[atf]._index, true);
+		_vm->_logicMgr->setupAltRoom(h->_curAnim->_atFrame[atf]._index, true);
 		break;
 	case ATFSETROOMF:
-		_vm->setRoom(h->_curAnim->_atFrame[atf]._index, false);
+		_vm->_logicMgr->setupAltRoom(h->_curAnim->_atFrame[atf]._index, false);
 		break;
 	case ATFREADBOX:
 		switch (h->_curAnim->_atFrame[atf]._index) {
diff --git a/engines/trecision/dialog.cpp b/engines/trecision/dialog.cpp
index 7693101e385..75fc7979fb1 100644
--- a/engines/trecision/dialog.cpp
+++ b/engines/trecision/dialog.cpp
@@ -24,6 +24,7 @@
 #include "trecision/actor.h"
 #include "trecision/defines.h"
 #include "trecision/dialog.h"
+#include "trecision/logic.h"
 #include "trecision/scheduler.h"
 #include "trecision/graphics.h"
 #include "trecision/text.h"
@@ -207,12 +208,12 @@ void DialogManager::afterChoice() {
 		break;
 	case dF213B:
 	case dF213:
-		_vm->setRoom(kRoom21, true);
+		_vm->_logicMgr->setupAltRoom(kRoom21, true);
 		break;
 
 	case dF212B:
 	case dF212:
-		_vm->setRoom(kRoom21, false);
+		_vm->_logicMgr->setupAltRoom(kRoom21, false);
 		break;
 
 	case dF321:
diff --git a/engines/trecision/logic.cpp b/engines/trecision/logic.cpp
index 639512d0f58..e5287d12739 100644
--- a/engines/trecision/logic.cpp
+++ b/engines/trecision/logic.cpp
@@ -540,7 +540,7 @@ bool LogicManager::startPlayDialog() {
 		_vm->_dialogMgr->playDialog(dF491);
 	} else if (_vm->_curRoom == kRoom4A && (_vm->_oldRoom == kRoom41D) && (_vm->_inventoryObj[kItemPositioner]._flag & kObjFlagExtra) && _vm->isObjectVisible(ocHELLEN4A)) {
 		if (_vm->_curRoom == kRoom41D)
-			_vm->readExtraObj41D();
+			_vm->readExtraObj41D();		
 		_vm->_dialogMgr->playDialog(dC4A1);
 	} else if (_vm->_curRoom == kRoom4P && (_vm->_oldRoom == kRoom4O) && !(_vm->_room[kRoom4P]._flag & kObjFlagDone)) {
 		_vm->_dialogMgr->playDialog(dF4PI);
@@ -2083,7 +2083,7 @@ bool LogicManager::useScreenWithScreen() {
 	case oRAMPINO21:
 		if (_vm->_useWith[WITH] == oTUBO21) {
 			_vm->_dialogMgr->playDialog(dF211);
-			_vm->setRoom(kRoom21, true);
+			_vm->_logicMgr->setupAltRoom(kRoom21, true);
 			_vm->_animMgr->_animTab[aBKG21]._flag &= ~SMKANIM_OFF1;
 			_vm->setObjectVisible(oRAMPINO21, false);
 			_vm->setObjectVisible(oTUBO21, false);
@@ -2752,11 +2752,11 @@ bool LogicManager::mouseOperate(uint16 curObj) {
 	case oPASSAGE24:
 		if (_vm->_room[kRoom24]._flag & kObjFlagExtra) {
 			_vm->_scheduler->doEvent(MC_CHARACTER, ME_CHARACTERACTION, MP_DEFAULT, a244, 0, 14, curObj);
-			_vm->setRoom(kRoom24, false);
+			_vm->_logicMgr->setupAltRoom(kRoom24, false);
 			retVal = false;
 		} else {
 			_vm->_scheduler->doEvent(MC_CHARACTER, ME_CHARACTERACTION, MP_DEFAULT, a243, 0, 13, curObj);
-			_vm->setRoom(kRoom24, true);
+			_vm->_logicMgr->setupAltRoom(kRoom24, true);
 			retVal = false;
 		}
 		break;
@@ -4091,16 +4091,16 @@ void LogicManager::doSystemChangeRoom() {
 	if (_vm->_room[_vm->_oldRoom]._flag & kObjFlagExtra) {
 		switch (_vm->_curObj) {
 		case od2ETO2C:
-			_vm->setRoom(kRoom2E, false);
+			_vm->_logicMgr->setupAltRoom(kRoom2E, false);
 			break;
 		case od24TO23:
-			_vm->setRoom(kRoom24, false);
+			_vm->_logicMgr->setupAltRoom(kRoom24, false);
 			break;
 		case od21TO22:
-			_vm->setRoom(kRoom21, false);
+			_vm->_logicMgr->setupAltRoom(kRoom21, false);
 			break;
 		case od2GVTO26:
-			_vm->setRoom(kRoom2GV, false);
+			_vm->_logicMgr->setupAltRoom(kRoom2GV, false);
 			break;
 		default:
 			break;
@@ -4108,13 +4108,13 @@ void LogicManager::doSystemChangeRoom() {
 	} else {
 		switch (_vm->_curObj) {
 		case oENTRANCE2E:
-			_vm->setRoom(kRoom2E, true);
+			_vm->_logicMgr->setupAltRoom(kRoom2E, true);
 			break;
 		case od24TO26:
-			_vm->setRoom(kRoom24, true);
+			_vm->_logicMgr->setupAltRoom(kRoom24, true);
 			break;
 		case od21TO23:
-			_vm->setRoom(kRoom21, true);
+			_vm->_logicMgr->setupAltRoom(kRoom21, true);
 			break;
 		default:
 			break;
@@ -4132,13 +4132,13 @@ void LogicManager::doSystemChangeRoom() {
 	_vm->_graphicsMgr->showCursor();
 
 	if (_vm->_curRoom == kRoom21) {
-		_vm->setRoom(kRoom21, _vm->_oldRoom == kRoom23A || _vm->_oldRoom == kRoom23B);
+		_vm->_logicMgr->setupAltRoom(kRoom21, _vm->_oldRoom == kRoom23A || _vm->_oldRoom == kRoom23B);
 	} else if (_vm->_curRoom == kRoom24) {
-		_vm->setRoom(kRoom24, _vm->_oldRoom == kRoom26);
+		_vm->_logicMgr->setupAltRoom(kRoom24, _vm->_oldRoom == kRoom26);
 	} else if (_vm->_curRoom == kRoom2A) {
-		_vm->setRoom(kRoom2A, _vm->_oldRoom == kRoom25);
+		_vm->_logicMgr->setupAltRoom(kRoom2A, _vm->_oldRoom == kRoom25);
 	} else if (_vm->_curRoom == kRoom2B) {
-		_vm->setRoom(kRoom2B, _vm->_oldRoom == kRoom28);
+		_vm->_logicMgr->setupAltRoom(kRoom2B, _vm->_oldRoom == kRoom28);
 	}
 	//			for save/load
 	else if (_vm->_room[_vm->_curRoom]._flag & kObjFlagExtra) {
diff --git a/engines/trecision/logic.h b/engines/trecision/logic.h
index 48146249bb7..3fbc2aaac64 100644
--- a/engines/trecision/logic.h
+++ b/engines/trecision/logic.h
@@ -24,6 +24,7 @@
 #define TRECISION_LOGIC_H
 
 #include "common/scummsys.h"
+#include "common/serializer.h"
 
 namespace Trecision {
 class TrecisionEngine;
diff --git a/engines/trecision/trecision.h b/engines/trecision/trecision.h
index 65606eddde5..195bb885dab 100644
--- a/engines/trecision/trecision.h
+++ b/engines/trecision/trecision.h
@@ -179,7 +179,6 @@ public:
 	void doMouseTalk(uint16 curObj);
 
 	// Utils
-	void setRoom(uint16 r, bool b);
 	uint16 textLength(const Common::String &text, uint16 begin = 0, uint16 end = 0);
 	Common::KeyCode waitKey();
 	void waitDelay(uint32 val);
diff --git a/engines/trecision/utils.cpp b/engines/trecision/utils.cpp
index 0dc94ed2a9c..551a2a59419 100644
--- a/engines/trecision/utils.cpp
+++ b/engines/trecision/utils.cpp
@@ -45,10 +45,6 @@ char *TrecisionEngine::getNextSentence() {
 	return _textPtr;
 }
 
-void TrecisionEngine::setRoom(uint16 r, bool b) {
-	_logicMgr->setupAltRoom(r, b);
-}
-
 /*-------------------------------------------------
  * Compute string length from character begin to end
  *-------------------------------------------------*/