diff --git a/src/Cuboid.h b/src/Cuboid.h
index 73edd31d9..acb19d46b 100644
--- a/src/Cuboid.h
+++ b/src/Cuboid.h
@@ -16,7 +16,7 @@ public:
 	cCuboid(const Vector3i & a_p1, const Vector3i & a_p2) : p1(a_p1), p2(a_p2) {}
 	cCuboid(int a_X1, int a_Y1, int a_Z1) : p1(a_X1, a_Y1, a_Z1), p2(a_X1, a_Y1, a_Z1) {}
 
-	#if 0  // tolua isn't aware of implicitly generated copy constructors
+	#ifdef TOLUA_EXPOSITION  // tolua isn't aware of implicitly generated copy constructors
 		cCuboid(const cCuboid & a_Cuboid);
 	#endif
 
diff --git a/src/Globals.h b/src/Globals.h
index 67f3cd284..0c48d2ad9 100644
--- a/src/Globals.h
+++ b/src/Globals.h
@@ -476,6 +476,10 @@ using cTickTimeLong = std::chrono::duration<Int64,  cTickTime::period>;
 	#define TOLUA_TEMPLATE_BIND(x)
 #endif
 
+#ifdef TOLUA_EXPOSITION
+	#error TOLUA_EXPOSITION should never actually be defined
+#endif
+
 
 
 
diff --git a/src/Item.h b/src/Item.h
index 493061d93..35c4e4582 100644
--- a/src/Item.h
+++ b/src/Item.h
@@ -80,20 +80,10 @@ public:
 
 	// The constructor is disabled in code, because the compiler generates it anyway,
 	// but it needs to stay because ToLua needs to generate the binding for it
-	#if 0
+	#ifdef TOLUA_EXPOSITION
 
 	/** Creates an exact copy of the item */
-	cItem(const cItem & a_CopyFrom) :
-		m_ItemType    (a_CopyFrom.m_ItemType),
-		m_ItemCount   (a_CopyFrom.m_ItemCount),
-		m_ItemDamage  (a_CopyFrom.m_ItemDamage),
-		m_Enchantments(a_CopyFrom.m_Enchantments),
-		m_CustomName  (a_CopyFrom.m_CustomName),
-		m_Lore        (a_CopyFrom.m_Lore),
-		m_RepairCost  (a_CopyFrom.m_RepairCost),
-		m_FireworkItem(a_CopyFrom.m_FireworkItem)
-	{
-	}
+	cItem(const cItem & a_CopyFrom);
 
 	#endif
 
diff --git a/src/Vector3.h b/src/Vector3.h
index 5c4839ab7..7c37c2601 100644
--- a/src/Vector3.h
+++ b/src/Vector3.h
@@ -21,7 +21,7 @@ public:
 	inline Vector3(T a_x, T a_y, T a_z) : x(a_x), y(a_y), z(a_z) {}
 
 
-	#if 0  // Hardcoded copy constructors (tolua++ does not support function templates .. yet)
+	#ifdef TOLUA_EXPOSITION  // Hardcoded copy constructors (tolua++ does not support function templates .. yet)
 		Vector3(const Vector3<float>  & a_Rhs);
 		Vector3(const Vector3<double> & a_Rhs);
 		Vector3(const Vector3<int>    & a_Rhs);