diff --git a/CHANGELOG.md b/CHANGELOG.md
index 129ff4fc..30c2b0d1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,7 @@ CHANGELOG for FlatCAM beta
 9.1.2021
 
 - attempting to fix issue #492 - when checking for tools present in the database there were some errors in the NCC, ISO, MILL, PAINT and CUTOUT Tools
+- minor change in Geometry Object
 
 8.01.2021
 
diff --git a/appObjects/FlatCAMGeometry.py b/appObjects/FlatCAMGeometry.py
index dcd095a8..123a7f7f 100644
--- a/appObjects/FlatCAMGeometry.py
+++ b/appObjects/FlatCAMGeometry.py
@@ -101,7 +101,7 @@ class GeometryObject(FlatCAMObj, Geometry):
                 except Exception as e:
                     self.app.log.error("FlatCAMObj.GeometryObject.init() --> %s" % str(e))
 
-        self.options["startz"] = self.app.defaults["geometry_startz"]
+        self.options["tools_mill_startz"] = self.app.defaults["tools_mill_startz"]
 
         # this will hold the tool unique ID that is useful when having multiple tools with same diameter
         self.tooluid = 0