diff --git a/src/bonsai/bonsai/tool/polyline.py b/src/bonsai/bonsai/tool/polyline.py
index 883d811448..90f81dc909 100644
--- a/src/bonsai/bonsai/tool/polyline.py
+++ b/src/bonsai/bonsai/tool/polyline.py
@@ -168,7 +168,7 @@ class Polyline(bonsai.core.tool.Polyline):
         distance = (mouse_vector - last_point).length
         if distance < 0:
             return
-        angle, orientation_angle, angle_round_threshold = None, None
+        angle, orientation_angle, angle_round_threshold = None, None, None
         if distance > 0:
             angle = tool.Cad.angle_3_vectors(
                 second_to_last_point, last_point, mouse_vector, new_angle=None, degrees=True