diff --git a/src/Mod/Arch/importWebGL.py b/src/Mod/Arch/importWebGL.py
index e9b1ef5cb7..c0c0b2df3d 100644
--- a/src/Mod/Arch/importWebGL.py
+++ b/src/Mod/Arch/importWebGL.py
@@ -733,7 +733,7 @@ def export( exportList, filename, colors = None, camera = None ):
         if obj.isDerivedFrom('Part::Feature'):
 
             deviation = 0.5
-            if FreeCADGui:
+            if FreeCADGui and hasattr(obj.ViewObject, "Deviation"):
                 deviation = obj.ViewObject.Deviation
 
                 # obj.ViewObject.DiffuseColor is length=1 when all faces are the same color, length=len(faces) for when they're not