diff --git a/src/build123d/topology.py b/src/build123d/topology.py
index acaaa8e6..48257e56 100644
--- a/src/build123d/topology.py
+++ b/src/build123d/topology.py
@@ -4786,7 +4786,7 @@ def _project_point_on_curve(curve, gp_pnt) -> float:
 
         point = Vector(point)
 
-        if not isclose_b(self.distance_to(point), 0):
+        if not isclose_b(self.distance_to(point), 0, abs_tol=TOLERANCE):
             raise ValueError(f"point ({point}) is not on edge")
 
         # Get the extreme of the parameter values for this Edge/Wire