diff --git a/LEGO1/lego/legoomni/include/legocarbuild.h b/LEGO1/lego/legoomni/include/legocarbuild.h
index 336f67de..81e63150 100644
--- a/LEGO1/lego/legoomni/include/legocarbuild.h
+++ b/LEGO1/lego/legoomni/include/legocarbuild.h
@@ -5,6 +5,8 @@
 #include "legostate.h"
 #include "legoworld.h"
 
+#include <SDL3/SDL_stdinc.h>
+
 class LegoCarBuildAnimPresenter;
 class LegoControlManagerNotificationParam;
 class LegoEventNotificationParam;
@@ -176,7 +178,7 @@ class LegoCarBuild : public LegoWorld {
 
 	MxU8 m_unk0x109;           // 0x109
 	MxU16 m_unk0x10a;          // 0x10a
-	DWORD m_unk0x10c;          // 0x10c
+	Uint64 m_unk0x10c;         // 0x10c
 	LegoROI* m_unk0x110;       // 0x110
 	BoundingSphere m_unk0x114; // 0x114
 	MxMatrix m_unk0x12c;       // 0x12c
diff --git a/LEGO1/lego/legoomni/include/mxtransitionmanager.h b/LEGO1/lego/legoomni/include/mxtransitionmanager.h
index 2019430c..820ce4ac 100644
--- a/LEGO1/lego/legoomni/include/mxtransitionmanager.h
+++ b/LEGO1/lego/legoomni/include/mxtransitionmanager.h
@@ -5,6 +5,7 @@
 #include "mxcore.h"
 
 #include <ddraw.h>
+#include <SDL3/SDL_stdinc.h>
 
 class MxVideoPresenter;
 
@@ -78,7 +79,7 @@ class MxTransitionManager : public MxCore {
 	MxU16 m_animationTimer;          // 0x34
 	MxU16 m_columnOrder[640];        // 0x36
 	MxU16 m_randomShift[480];        // 0x536
-	MxULong m_systemTime;            // 0x8f8
+	Uint64 m_systemTime;             // 0x8f8
 	MxS32 m_animationSpeed;          // 0x8fc
 };
 
diff --git a/LEGO1/lego/legoomni/src/build/legocarbuild.cpp b/LEGO1/lego/legoomni/src/build/legocarbuild.cpp
index 7f018b05..c42dd6c0 100644
--- a/LEGO1/lego/legoomni/src/build/legocarbuild.cpp
+++ b/LEGO1/lego/legoomni/src/build/legocarbuild.cpp
@@ -35,6 +35,7 @@
 #include <vec.h>
 
 #include <SDL3/SDL_stdinc.h>
+#include <SDL3/SDL_timer.h>
 
 // Names and values verified by BETA10 0x1006d742.
 // Note that these were probably hard-coded numbers in the original.
@@ -561,7 +562,7 @@ MxResult LegoCarBuild::Tickle()
 	}
 
 	if (m_unk0x10a) {
-		DWORD time = timeGetTime();
+		Uint64 time = SDL_GetTicks();
 		DWORD dTime = (time - m_unk0x10c) / 100;
 
 		if (m_carId == RaceCar_Actor) {
@@ -1605,7 +1606,7 @@ void LegoCarBuild::FUN_10025720(undefined4 p_param)
 #endif
 
 	if (m_unk0x10a != 0) {
-		m_unk0x10c = timeGetTime();
+		m_unk0x10c = SDL_GetTicks();
 	}
 }
 
diff --git a/LEGO1/lego/legoomni/src/common/mxtransitionmanager.cpp b/LEGO1/lego/legoomni/src/common/mxtransitionmanager.cpp
index 566468e5..1a8dada3 100644
--- a/LEGO1/lego/legoomni/src/common/mxtransitionmanager.cpp
+++ b/LEGO1/lego/legoomni/src/common/mxtransitionmanager.cpp
@@ -12,6 +12,8 @@
 #include "mxticklemanager.h"
 #include "mxvideopresenter.h"
 
+#include <SDL3/SDL_timer.h>
+
 DECOMP_SIZE_ASSERT(MxTransitionManager, 0x900)
 
 // GLOBAL: LEGO1 0x100f4378
@@ -54,11 +56,11 @@ MxResult MxTransitionManager::GetDDrawSurfaceFromVideoManager() // vtable+0x14
 // FUNCTION: LEGO1 0x1004bac0
 MxResult MxTransitionManager::Tickle()
 {
-	if (m_animationSpeed + m_systemTime > timeGetTime()) {
+	if (m_animationSpeed + m_systemTime > SDL_GetTicks()) {
 		return SUCCESS;
 	}
 
-	m_systemTime = timeGetTime();
+	m_systemTime = SDL_GetTicks();
 
 	switch (m_mode) {
 	case e_noAnimation:
@@ -112,7 +114,7 @@ MxResult MxTransitionManager::StartTransition(
 			action->SetFlags(action->GetFlags() | MxDSAction::c_bit10);
 		}
 
-		MxU32 time = timeGetTime();
+		Uint64 time = SDL_GetTicks();
 		m_systemTime = time;
 
 		m_animationSpeed = p_speed;
diff --git a/LEGO1/omni/include/mxtimer.h b/LEGO1/omni/include/mxtimer.h
index 02e55146..eb423f2d 100644
--- a/LEGO1/omni/include/mxtimer.h
+++ b/LEGO1/omni/include/mxtimer.h
@@ -3,6 +3,8 @@
 
 #include "mxcore.h"
 
+#include <SDL3/SDL_stdinc.h>
+
 // VTABLE: LEGO1 0x100dc0e0
 // VTABLE: BETA10 0x101c1bb0
 // SIZE 0x10
@@ -35,7 +37,7 @@ class MxTimer : public MxCore {
 	// MxTimer::`scalar deleting destructor'
 
 private:
-	MxLong m_startTime; // 0x08
+	Uint64 m_startTime; // 0x08
 	MxBool m_isRunning; // 0x0c
 
 	static MxLong g_lastTimeCalculated;
diff --git a/LEGO1/omni/src/common/mxtimer.cpp b/LEGO1/omni/src/common/mxtimer.cpp
index 98111b50..5a318c54 100644
--- a/LEGO1/omni/src/common/mxtimer.cpp
+++ b/LEGO1/omni/src/common/mxtimer.cpp
@@ -1,6 +1,6 @@
 #include "mxtimer.h"
 
-#include <windows.h>
+#include <SDL3/SDL_timer.h>
 
 // GLOBAL: LEGO1 0x10101414
 // GLOBAL: BETA10 0x10201f84
@@ -14,7 +14,7 @@ MxLong MxTimer::g_lastTimeTimerStarted = 0;
 MxTimer::MxTimer()
 {
 	m_isRunning = FALSE;
-	m_startTime = timeGetTime();
+	m_startTime = SDL_GetTicks();
 	InitLastTimeCalculated();
 }
 
@@ -22,7 +22,7 @@ MxTimer::MxTimer()
 // FUNCTION: BETA10 0x1012bf23
 MxLong MxTimer::GetRealTime()
 {
-	MxTimer::g_lastTimeCalculated = timeGetTime();
+	MxTimer::g_lastTimeCalculated = SDL_GetTicks();
 	return MxTimer::g_lastTimeCalculated - m_startTime;
 }