diff --git a/src/gerbonara/graphic_objects.py b/src/gerbonara/graphic_objects.py
index 07b2a6a..308fc79 100644
--- a/src/gerbonara/graphic_objects.py
+++ b/src/gerbonara/graphic_objects.py
@@ -307,6 +307,7 @@ class Region(GraphicObject):
 
     def _offset(self, dx, dy):
         self.outline = [ (x+dx, y+dy) for x, y in self.outline ]
+        self.arc_centers = [ (c[0], (c[1][0]+dx, c[1][1]+dy)) if c else None for c in self.arc_centers ]
 
     def _rotate(self, angle, cx=0, cy=0):
         self.outline = [ gp.rotate_point(x, y, angle, cx, cy) for x, y in self.outline ]
diff --git a/tests/test_primitives.py b/tests/test_primitives.py
index 3d9dab8..c1a9c21 100644
--- a/tests/test_primitives.py
+++ b/tests/test_primitives.py
@@ -177,6 +177,7 @@ def test_region_rectangle(w, h, tmpfile, img_support):
 def test_region_arc_segments(start_angle_deg, sweep_angle_deg, tmpfile, img_support):
     """Test Region objects with arc segments."""
     with object_test(tmpfile, img_support, epsilon=1e-2) as gbr:
+        print(f'{start_angle_deg=} {sweep_angle_deg=}')
         start_angle = math.radians(start_angle_deg)
         sweep_angle = math.radians(sweep_angle_deg)
         r = 15
@@ -185,11 +186,11 @@ def test_region_arc_segments(start_angle_deg, sweep_angle_deg, tmpfile, img_supp
         region = Region(unit=MM)
 
         region.outline.append((0, 0))
-        region.outline.append((r * math.cos(start_angle), r * math.sin(start_angle)))
         region.outline.append((r * math.cos(start_angle + sweep_angle), r * math.sin(start_angle + sweep_angle)))
+        region.outline.append((r * math.cos(start_angle), r * math.sin(start_angle)))
         region.outline.append((0, 0))
         region.arc_centers.append(None)
-        region.arc_centers.append(None)
         region.arc_centers.append((True, (0, 0)))
+        region.arc_centers.append(None)
 
         gbr.objects.append(region)