diff --git a/Source/Editor/Editor.cs b/Source/Editor/Editor.cs
index 795f89d55..3a11ed449 100644
--- a/Source/Editor/Editor.cs
+++ b/Source/Editor/Editor.cs
@@ -1686,9 +1686,6 @@ namespace FlaxEditor
         [return: MarshalAs(UnmanagedType.U1)]
         internal static partial bool Internal_CanSetToRoot(IntPtr prefab, IntPtr newRoot);
 
-        [LibraryImport("FlaxEngine", EntryPoint = "EditorInternal_GetPrefabNestedObject", StringMarshalling = StringMarshalling.Custom, StringMarshallingCustomType = typeof(StringMarshaller))]
-        internal static partial void Internal_GetPrefabNestedObject(IntPtr prefabId, IntPtr prefabObjectId, IntPtr outPrefabId, IntPtr outPrefabObjectId);
-
         [LibraryImport("FlaxEngine", EntryPoint = "EditorInternal_GetAnimationTime", StringMarshalling = StringMarshalling.Custom, StringMarshallingCustomType = typeof(StringMarshaller))]
         internal static partial float Internal_GetAnimationTime(IntPtr animatedModel);
 
diff --git a/Source/Editor/Undo/Actions/BreakPrefabLinkAction.cs b/Source/Editor/Undo/Actions/BreakPrefabLinkAction.cs
index 55553de25..a6f338633 100644
--- a/Source/Editor/Undo/Actions/BreakPrefabLinkAction.cs
+++ b/Source/Editor/Undo/Actions/BreakPrefabLinkAction.cs
@@ -23,7 +23,7 @@ namespace FlaxEditor.Actions
             public Guid PrefabID;
             public Guid PrefabObjectID;
 
-            public unsafe Item(SceneObject obj, List<Item> nestedPrefabLinks)
+            public Item(SceneObject obj, List<Item> nestedPrefabLinks)
             {
                 ID = obj.ID;
                 PrefabID = obj.PrefabID;
@@ -33,8 +33,7 @@ namespace FlaxEditor.Actions
                     // Check if this object comes from another nested prefab (to break link only from the top-level prefab)
                     Item nested;
                     nested.ID = ID;
-                    fixed (Item* i = &this)
-                        Editor.Internal_GetPrefabNestedObject(new IntPtr(&i->PrefabID), new IntPtr(&i->PrefabObjectID), new IntPtr(&nested.PrefabID), new IntPtr(&nested.PrefabObjectID));
+                    Editor.GetPrefabNestedObject(ref PrefabID, ref PrefabObjectID, out nested.PrefabID, out nested.PrefabObjectID);
                     if (nested.PrefabID != Guid.Empty && nested.PrefabObjectID != Guid.Empty)
                         nestedPrefabLinks.Add(nested);
                 }
diff --git a/Source/Engine/Serialization/Serialization.h b/Source/Engine/Serialization/Serialization.h
index 125803f5b..a65b674a8 100644
--- a/Source/Engine/Serialization/Serialization.h
+++ b/Source/Engine/Serialization/Serialization.h
@@ -7,6 +7,7 @@
 #include "Engine/Core/Collections/Array.h"
 #include "Engine/Core/Collections/Dictionary.h"
 #include "Engine/Scripting/ScriptingObject.h"
+#include "Engine/Level/SceneObject.h"
 #include "Engine/Utilities/Encryption.h"
 
 struct Version;