diff --git a/Source/VisualU/Public/Scenario.h b/Source/VisualU/Public/Scenario.h
index 30eb0f8..326a229 100644
--- a/Source/VisualU/Public/Scenario.h
+++ b/Source/VisualU/Public/Scenario.h
@@ -18,7 +18,7 @@ class USoundCue;
 * Describes UVisualSprite for UVisualRenderer. 
 */
 USTRUCT(BlueprintType)
-struct FSprite
+struct VISUALU_API FSprite
 {
 	GENERATED_BODY()
 
@@ -112,7 +112,7 @@ struct FSprite
 * Describes what background to display and what effect to use for transition.
 */
 USTRUCT(BlueprintType)
-struct FBackground
+struct VISUALU_API FBackground
 {
 	GENERATED_BODY()
 
@@ -182,7 +182,7 @@ ENUM_CLASS_FLAGS(EScenarioMetaFlags)
 * Data that describes FScenario.
 */
 USTRUCT(BlueprintType)
-struct FVisualScenarioInfo : public FVisualInfo
+struct VISUALU_API FVisualScenarioInfo : public FVisualInfo
 {
 	GENERATED_BODY()
 
diff --git a/Source/VisualU/Public/VisualTemplates.h b/Source/VisualU/Public/VisualTemplates.h
index 59302f6..bc09027 100644
--- a/Source/VisualU/Public/VisualTemplates.h
+++ b/Source/VisualU/Public/VisualTemplates.h
@@ -31,7 +31,7 @@ concept HasMemberOfType = HasMemberOfTypeImpl<T, U>::value;
 * Assigns values, in order, to the member variables of the object.
 */
 template<typename T, typename... V>
-VISUALU_API inline void UpdateMembers(T* Obj, V T::*... Pointers, const V&... Values)
+inline void UpdateMembers(T* Obj, V T::*... Pointers, const V&... Values)
 {
 	((Obj->*Pointers = Values), ...);
 }
diff --git a/Source/VisualU/Public/VisualVersioningSubsystem.h b/Source/VisualU/Public/VisualVersioningSubsystem.h
index 8179e5b..7a255f4 100644
--- a/Source/VisualU/Public/VisualVersioningSubsystem.h
+++ b/Source/VisualU/Public/VisualVersioningSubsystem.h
@@ -5,6 +5,7 @@
 #include "CoreMinimal.h"
 #include "Subsystems/LocalPlayerSubsystem.h"
 #include "Scenario.h"
+#include "InfoAssignable.h"
 #include "Engine/DataTable.h"
 #include "VisualController.h"
 #include "VisualTemplates.h"
@@ -72,7 +73,7 @@ class VISUALU_API UVisualVersioningSubsystem : public ULocalPlayerSubsystem
 		FScenario* Scene = GetSceneChecked(DataTable, SceneName);
 		FScenarioId Id{ Scene->GetOwner(), Scene->GetIndex() };
 		Versions.Add(Id, Scene->Info);
-		UpdateMembers(Scene->Info, Members, Values);
+		UpdateMembers<T, V...>(&Scene->Info, Members..., Values...);
 	}
 
 	/**
@@ -86,7 +87,7 @@ class VISUALU_API UVisualVersioningSubsystem : public ULocalPlayerSubsystem
 		check(Scene);
 		FScenarioId Id{ Scene->GetOwner(), Scene->GetIndex() };
 		Versions.Add(Id, Scene->Info);
-		UpdateMembers(Scene->Info, Members, Values);
+		UpdateMembers<T, V...>(&Scene->Info, Members..., Values...);
 	}
 
 	/**