diff --git a/src/openrct2/object/Object.cpp b/src/openrct2/object/Object.cpp
index 8a6c4cb619..94a3aff0e9 100644
--- a/src/openrct2/object/Object.cpp
+++ b/src/openrct2/object/Object.cpp
@@ -197,6 +197,7 @@ void Object::UnloadImages()
     if (_baseImageId != ImageIndexUndefined)
     {
         GfxObjectFreeImages(_baseImageId, GetImageTable().GetCount());
+        _baseImageId = ImageIndexUndefined;
     }
 }
 
diff --git a/src/openrct2/object/WaterObject.cpp b/src/openrct2/object/WaterObject.cpp
index 98f3b81788..2f3b976d07 100644
--- a/src/openrct2/object/WaterObject.cpp
+++ b/src/openrct2/object/WaterObject.cpp
@@ -51,6 +51,8 @@ void WaterObject::Unload()
 
     _legacyType.string_idx = 0;
     _legacyType.image_id = 0;
+    _legacyType.palette_index_1 = 0;
+    _legacyType.palette_index_2 = 0;
 }
 
 void WaterObject::DrawPreview(DrawPixelInfo& dpi, int32_t width, int32_t height) const