diff --git a/compensation/utils/quality.py b/compensation/utils/quality.py
index e6641ec8..6edd691d 100644
--- a/compensation/utils/quality.py
+++ b/compensation/utils/quality.py
@@ -91,8 +91,9 @@ class EcoAccountQualityChecker(CompensationQualityChecker):
         Returns:
 
         """
-        surface = self.obj.deductable_surface
-        if surface is None or surface == 0:
+        surface = self.obj.deductable_surface or 0
+        is_surface_invalid = surface == 0
+        if is_surface_invalid:
             self._add_missing_attr_name(_("Available Surface"))
         after_state_surface = self.obj.get_state_after_surface_sum()
         if surface > after_state_surface: