diff --git a/src/libslic3r/ExtrusionEntity.hpp b/src/libslic3r/ExtrusionEntity.hpp
index 0591e8a26..47c33938a 100644
--- a/src/libslic3r/ExtrusionEntity.hpp
+++ b/src/libslic3r/ExtrusionEntity.hpp
@@ -186,7 +186,7 @@ public:
     ExtrusionEntity* clone() const override { return new ExtrusionPathOriented(*this); }
     // Create a new object, initialize it with this object using the move semantics.
     ExtrusionEntity* clone_move() override { return new ExtrusionPathOriented(std::move(*this)); }
-    virtual bool can_reverse() const { return false; }
+    virtual bool can_reverse() const override { return false; }
 };
 
 typedef std::vector<ExtrusionPath> ExtrusionPaths;
diff --git a/src/libslic3r/PrintObject.cpp b/src/libslic3r/PrintObject.cpp
index d3ac219b0..1fc331935 100644
--- a/src/libslic3r/PrintObject.cpp
+++ b/src/libslic3r/PrintObject.cpp
@@ -962,7 +962,7 @@ void PrintObject::detect_surfaces_type()
         #endif /* SLIC3R_DEBUG_SLICE_PROCESSING */
                     
                     // save surfaces to layer
-                    Surfaces &surfaces_out = interface_shells ? surfaces_new[idx_layer] : layerm->slices().surfaces;
+                    Surfaces &surfaces_out = interface_shells ? surfaces_new[idx_layer] : layerm->m_slices.surfaces;
                     Surfaces  surfaces_backup;
                     if (! interface_shells) {
                         surfaces_backup = std::move(surfaces_out);
diff --git a/src/libslic3r/PrintObjectSlice.cpp b/src/libslic3r/PrintObjectSlice.cpp
index f5ba3b9d7..81e21f305 100644
--- a/src/libslic3r/PrintObjectSlice.cpp
+++ b/src/libslic3r/PrintObjectSlice.cpp
@@ -543,7 +543,7 @@ void PrintObject::slice()
 }
 
 template<typename ThrowOnCancel>
-static inline void apply_mm_segmentation(PrintObject &print_object, ThrowOnCancel throw_on_cancel)
+void apply_mm_segmentation(PrintObject &print_object, ThrowOnCancel throw_on_cancel)
 {
     // Returns MMU segmentation based on painting in MMU segmentation gizmo
     std::vector<std::vector<ExPolygons>> segmentation = multi_material_segmentation_by_painting(print_object, throw_on_cancel);