diff --git a/src/Mod/Path/PathScripts/PathAdaptive.py b/src/Mod/Path/PathScripts/PathAdaptive.py
index 8368a38892..f62d810553 100644
--- a/src/Mod/Path/PathScripts/PathAdaptive.py
+++ b/src/Mod/Path/PathScripts/PathAdaptive.py
@@ -33,6 +33,7 @@ import json
 import math
 import area
 
+from FreeCAD import Units
 from PySide import QtCore
 
 # lazily loaded modules
@@ -104,7 +105,13 @@ def sceneClean():
 
 
 def discretize(edge, flipDirection=False):
-    pts = edge.discretize(Deflection=0.0001)
+    val=Units.Quantity("1mm").getUserPreferred()
+    if len(val)==3 and val[2]=='mm':
+        deflection=0.002
+    else:
+        deflection=0.0001
+
+    pts = edge.discretize(Deflection=deflection)
     if flipDirection:
         pts.reverse()