diff --git a/src/libslic3r/Model.cpp b/src/libslic3r/Model.cpp
index 3d74e7897..e834b26f5 100644
--- a/src/libslic3r/Model.cpp
+++ b/src/libslic3r/Model.cpp
@@ -565,8 +565,13 @@ bool Model::looks_like_multipart_object() const
     for (const ModelObject *obj : this->objects) {
         if (obj->volumes.size() > 1 || obj->config.keys().size() > 1)
             return false;
+        Vec3d instance_offset_matrix = obj->instances[0]->m_transformation.get_offset();
         for (const ModelVolume *vol : obj->volumes) {
-            double zmin_this = vol->mesh().bounding_box().min(2);
+            Vec3d volume_offset_matrix = vol->m_transformation.get_offset();
+            BoundingBoxf3 bounding_box = vol->mesh().bounding_box();
+            bounding_box.translate(instance_offset_matrix);
+            bounding_box.translate(volume_offset_matrix);
+            double zmin_this = bounding_box.min(2);
             if (zmin == std::numeric_limits<double>::max())
                 zmin = zmin_this;
             else if (std::abs(zmin - zmin_this) > EPSILON)