diff --git a/src/libslic3r/Print.cpp b/src/libslic3r/Print.cpp
index 3ca8bd020f..c6417e700c 100644
--- a/src/libslic3r/Print.cpp
+++ b/src/libslic3r/Print.cpp
@@ -2044,7 +2044,6 @@ void Print::process(long long *time_cost_with_cache, bool use_cache)
         //BBS: get the objects' indices when GCodes are generated
         ToolOrdering tool_ordering;
         unsigned int initial_extruder_id = (unsigned int)-1;
-        unsigned int final_extruder_id = (unsigned int)-1;
         bool         has_wipe_tower = false;
         std::vector<const PrintInstance*> 					print_object_instances_ordering;
         std::vector<const PrintInstance*>::const_iterator 	print_object_instance_sequential_active;
@@ -2752,7 +2751,7 @@ void Print::_make_wipe_tower()
             for (auto &layer_tools : m_wipe_tower_data.tool_ordering.layer_tools()) { // for all layers
                 if (!layer_tools.has_wipe_tower)
                     continue;
-                // bool first_layer = &layer_tools == &m_wipe_tower_data.tool_ordering.front();
+                bool first_layer = &layer_tools == &m_wipe_tower_data.tool_ordering.front();
                 wipe_tower.plan_toolchange((float) layer_tools.print_z, (float) layer_tools.wipe_tower_layer_height, current_extruder_id,
                                            current_extruder_id, false);
                 for (const auto extruder_id : layer_tools.extruders) {