diff --git a/lib/Slic3r/GUI/Plater.pm b/lib/Slic3r/GUI/Plater.pm
index 95d333789..9f1563d4b 100644
--- a/lib/Slic3r/GUI/Plater.pm
+++ b/lib/Slic3r/GUI/Plater.pm
@@ -1676,7 +1676,6 @@ sub on_model_change {
     }
     $self->refresh_canvases;
     
-    my $running = $self->pause_background_process;
     my $invalidated = $self->{print}->reload_model_instances();
     
     if ($Slic3r::GUI::Settings->{_}{background_processing}) {