diff --git a/xs/src/libslic3r/Print.cpp b/xs/src/libslic3r/Print.cpp
index a5e826161..d67fe5884 100644
--- a/xs/src/libslic3r/Print.cpp
+++ b/xs/src/libslic3r/Print.cpp
@@ -159,7 +159,7 @@ bool Print::invalidate_state_by_config_options(const std::vector<t_config_option
         "wipe"
     };
 
-    static std::unordered_set<std::string> steps_ignore = {};
+    static std::unordered_set<std::string> steps_ignore;
 
     std::vector<PrintStep> steps;
     std::vector<PrintObjectStep> osteps;
diff --git a/xs/src/libslic3r/TriangleMesh.hpp b/xs/src/libslic3r/TriangleMesh.hpp
index 55900656b..9a09975cd 100644
--- a/xs/src/libslic3r/TriangleMesh.hpp
+++ b/xs/src/libslic3r/TriangleMesh.hpp
@@ -134,7 +134,7 @@ public:
     typedef std::function<void()> throw_on_cancel_callback_type;
     TriangleMeshSlicer() : mesh(nullptr) {}
     // Not quite nice, but the constructor and init() methods require non-const mesh pointer to be able to call mesh->require_shared_vertices()
-    TriangleMeshSlicer(TriangleMesh* mesh) { this->init(mesh, throw_on_cancel_callback_type()); }
+	TriangleMeshSlicer(TriangleMesh* mesh) { this->init(mesh, [](){}); }
     void init(TriangleMesh *mesh, throw_on_cancel_callback_type throw_on_cancel);
     void slice(const std::vector<float> &z, std::vector<Polygons>* layers, throw_on_cancel_callback_type throw_on_cancel) const;
     void slice(const std::vector<float> &z, std::vector<ExPolygons>* layers, throw_on_cancel_callback_type throw_on_cancel) const;