diff --git a/src/libslic3r/TreeModelVolumes.cpp b/src/libslic3r/TreeModelVolumes.cpp
index 399685e9c..e14ec5a69 100644
--- a/src/libslic3r/TreeModelVolumes.cpp
+++ b/src/libslic3r/TreeModelVolumes.cpp
@@ -359,7 +359,7 @@ const Polygons& TreeModelVolumes::getCollision(const coord_t orig_radius, LayerI
         BOOST_LOG_TRIVIAL(error_level_not_in_cache) << "Had to calculate collision at radius " << radius << " and layer " << layer_idx << ", but precalculate was called. Performance may suffer!";
         tree_supports_show_error("Not precalculated Collision requested."sv, false);
     }
-    const_cast<TreeModelVolumes*>(this)->calculateCollision(radius, layer_idx, {});
+    const_cast<TreeModelVolumes*>(this)->calculateCollision(radius, layer_idx, []{});
     return getCollision(orig_radius, layer_idx, min_xy_dist);
 }
 
diff --git a/src/libslic3r/TreeModelVolumes.hpp b/src/libslic3r/TreeModelVolumes.hpp
index f5b5669bb..139b12328 100644
--- a/src/libslic3r/TreeModelVolumes.hpp
+++ b/src/libslic3r/TreeModelVolumes.hpp
@@ -512,7 +512,7 @@ private:
      */
     void calculateCollisionHolefree(RadiusLayerPair key)
     {
-        calculateCollisionHolefree(std::vector<RadiusLayerPair>{ RadiusLayerPair(key) }, {});
+        calculateCollisionHolefree(std::vector<RadiusLayerPair>{ RadiusLayerPair(key) }, []{});
     }
 
     /*!
@@ -533,7 +533,7 @@ private:
      */
     void calculateAvoidance(RadiusLayerPair key, bool to_build_plate, bool to_model)
     {
-        calculateAvoidance(std::vector<RadiusLayerPair>{ RadiusLayerPair(key) }, to_build_plate, to_model, {});
+        calculateAvoidance(std::vector<RadiusLayerPair>{ RadiusLayerPair(key) }, to_build_plate, to_model, []{});
     }
 
     /*!
@@ -567,7 +567,7 @@ private:
      */
     void calculateWallRestrictions(RadiusLayerPair key)
     {
-        calculateWallRestrictions(std::vector<RadiusLayerPair>{ RadiusLayerPair(key) }, {});
+        calculateWallRestrictions(std::vector<RadiusLayerPair>{ RadiusLayerPair(key) }, []{});
     }
 
     /*!