diff --git a/Source/Engine/Core/ObjectsRemovalService.cpp b/Source/Engine/Core/ObjectsRemovalService.cpp
index a020f7844..a185ce8b3 100644
--- a/Source/Engine/Core/ObjectsRemovalService.cpp
+++ b/Source/Engine/Core/ObjectsRemovalService.cpp
@@ -5,6 +5,7 @@
 #include "Collections/Dictionary.h"
 #include "Engine/Engine/Time.h"
 #include "Engine/Engine/EngineService.h"
+#include "Engine/Platform/CriticalSection.h"
 #include "Engine/Profiler/ProfilerCPU.h"
 #include "Engine/Scripting/ScriptingObject.h"
 
diff --git a/Source/Engine/Level/SceneObjectsFactory.cpp b/Source/Engine/Level/SceneObjectsFactory.cpp
index 5632d8bc7..3bf0f68a1 100644
--- a/Source/Engine/Level/SceneObjectsFactory.cpp
+++ b/Source/Engine/Level/SceneObjectsFactory.cpp
@@ -16,6 +16,7 @@
 #include "Engine/Threading/ThreadLocal.h"
 #if !BUILD_RELEASE || USE_EDITOR
 #include "Engine/Level/Level.h"
+#include "Engine/Threading/Threading.h"
 #endif
 
 SceneObjectsFactory::Context::Context(ISerializeModifier* modifier)
diff --git a/Source/Engine/Navigation/NavCrowd.cpp b/Source/Engine/Navigation/NavCrowd.cpp
index b05f0f7d3..fe1c2f728 100644
--- a/Source/Engine/Navigation/NavCrowd.cpp
+++ b/Source/Engine/Navigation/NavCrowd.cpp
@@ -7,6 +7,7 @@
 #include "Engine/Level/Level.h"
 #include "Engine/Level/Scene/Scene.h"
 #include "Engine/Profiler/ProfilerCPU.h"
+#include "Engine/Threading/Threading.h"
 #include <ThirdParty/recastnavigation/DetourCrowd.h>
 
 NavCrowd::NavCrowd(const SpawnParams& params)