diff --git a/src/openrct2/world/Sprite.cpp b/src/openrct2/world/Sprite.cpp
index 016be80088..8ba1fd17cc 100644
--- a/src/openrct2/world/Sprite.cpp
+++ b/src/openrct2/world/Sprite.cpp
@@ -34,6 +34,17 @@
 #include <numeric>
 #include <vector>
 
+union Entity
+{
+    uint8_t pad_00[0x200];
+    EntityBase base;
+    // Provide a constructor as EntityBase is not trivially constructible
+    Entity()
+        : pad_00()
+    {
+    }
+};
+
 static Entity _entities[MAX_ENTITIES];
 static std::array<std::list<uint16_t>, EnumValue(EntityType::Count)> gEntityLists;
 static std::vector<uint16_t> _freeIdList;
diff --git a/src/openrct2/world/Sprite.h b/src/openrct2/world/Sprite.h
index a1740b6c4d..affeb4b833 100644
--- a/src/openrct2/world/Sprite.h
+++ b/src/openrct2/world/Sprite.h
@@ -15,29 +15,12 @@
 #include <array>
 
 #pragma pack(push, 1)
-/**
- * Entity structure.
- * size: 0x0200
- */
-union Entity
-{
-    uint8_t pad_00[0x200];
-    EntityBase base;
-    // Provide a constructor as EntityBase is not trivially constructible
-    Entity()
-        : pad_00()
-    {
-    }
-};
-assert_struct_size(Entity, 0x200);
-
 struct EntitiesChecksum
 {
     std::array<std::byte, 20> raw;
 
     std::string ToString() const;
 };
-
 #pragma pack(pop)
 
 void ResetAllEntities();