diff --git a/lib/Slic3r/ExtrusionLoop.pm b/lib/Slic3r/ExtrusionLoop.pm
index a57b0a459..adaa61210 100644
--- a/lib/Slic3r/ExtrusionLoop.pm
+++ b/lib/Slic3r/ExtrusionLoop.pm
@@ -60,6 +60,7 @@ sub split_at {
 
 sub split_at_first_point {
     my $self = shift;
+    $self->deserialize;
     return $self->split_at($self->polygon->[0]);
 }