diff --git a/AppObjects/FlatCAMExcellon.py b/AppObjects/FlatCAMExcellon.py
index 9095a3f4..c0250871 100644
--- a/AppObjects/FlatCAMExcellon.py
+++ b/AppObjects/FlatCAMExcellon.py
@@ -1258,7 +1258,7 @@ class ExcellonObject(FlatCAMObj, Excellon):
                 return False, "Error: Milling tool is larger than hole."
 
         def geo_init(geo_obj, app_obj):
-            assert geo_obj.kind == 'geometry' "Initializer expected a GeometryObject, got %s" % type(geo_obj)
+            assert geo_obj.kind == 'geometry', "Initializer expected a GeometryObject, got %s" % type(geo_obj)
 
             # ## Add properties to the object
 
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9dfab086..923123d0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -29,6 +29,7 @@ CHANGELOG for FlatCAM beta
 - added confirmation messages for toggle of HUD, Grid, Grid Snap, Axis
 - added icon in status bar for HUD; clicking on it will toggle the HUD (heads up display)
 - fixes due of recent changes
+- fixed issue #417
 
 17.05.2020