diff --git a/lib/Slic3r/Print/Object.pm b/lib/Slic3r/Print/Object.pm
index e3142e6ef..380da13f8 100644
--- a/lib/Slic3r/Print/Object.pm
+++ b/lib/Slic3r/Print/Object.pm
@@ -558,16 +558,4 @@ sub combine_infill {
     }
 }
 
-# Simplify the sliced model, if "resolution" configuration parameter > 0.
-# The simplification is problematic, because it simplifies the slices independent from each other,
-# which makes the simplified discretization visible on the object surface.
-sub _simplify_slices {
-    my ($self, $distance) = @_;
-    
-    foreach my $layer (@{$self->layers}) {
-        $layer->slices->simplify($distance);
-        $_->slices->simplify($distance) for @{$layer->regions};
-    }
-}
-
 1;
diff --git a/xs/src/libslic3r/Print.hpp b/xs/src/libslic3r/Print.hpp
index e8f65dd61..e3420a5a9 100644
--- a/xs/src/libslic3r/Print.hpp
+++ b/xs/src/libslic3r/Print.hpp
@@ -198,6 +198,8 @@ class PrintObject
     /// Idempotence of this method is guaranteed by the fact that we don't remove things from
     /// fill_surfaces but we only turn them into VOID surfaces, thus preserving the boundaries.
     void clip_fill_surfaces();
+    
+    void _simplify_slices(double distance);
       
     private:
     Print* _print;
diff --git a/xs/src/libslic3r/PrintObject.cpp b/xs/src/libslic3r/PrintObject.cpp
index a4f8f3bdf..aa3680e62 100644
--- a/xs/src/libslic3r/PrintObject.cpp
+++ b/xs/src/libslic3r/PrintObject.cpp
@@ -1635,4 +1635,17 @@ PrintObject::clip_fill_surfaces()
     }
 }
 
+// Simplify the sliced model, if "resolution" configuration parameter > 0.
+// The simplification is problematic, because it simplifies the slices independent from each other,
+// which makes the simplified discretization visible on the object surface.
+void
+PrintObject::_simplify_slices(double distance)
+{
+    for (auto* layer : this->layers) {
+        layer->slices.simplify(distance);
+        for (auto* layerm : layer->regions)
+            layerm->slices.simplify(distance);
+    }
+}
+
 }
diff --git a/xs/xsp/Print.xsp b/xs/xsp/Print.xsp
index 7372c63c9..6c49abb3b 100644
--- a/xs/xsp/Print.xsp
+++ b/xs/xsp/Print.xsp
@@ -152,6 +152,7 @@ _constant()
         %};
     void _make_perimeters();
     void _infill();
+    void _simplify_slices(double distance);
     
     int ptr()
         %code%{ RETVAL = (int)(intptr_t)THIS; %};