diff --git a/lib/Slic3r/Print/Object.pm b/lib/Slic3r/Print/Object.pm
index bef7dbf84..837fe9006 100644
--- a/lib/Slic3r/Print/Object.pm
+++ b/lib/Slic3r/Print/Object.pm
@@ -201,7 +201,7 @@ sub slice {
             }
             $self->layer_height_spline->setLayers(\@layers);
             if ($self->config->adaptive_slicing) { # smoothing after adaptive algorithm
-               $self->layer_height_spline->setLayers($self->layer_height_spline->getInterpolatedLayers);
+               @layers = @{$self->layer_height_spline->getInterpolatedLayers};
             }
         }