diff --git a/store/models.py b/store/models.py
index 15bca0a..c8dc55e 100644
--- a/store/models.py
+++ b/store/models.py
@@ -641,12 +641,12 @@ class Checklist(models.Model):
             if self.gift != old_obj.gift:
                 # Decrement new gift
                 if self.gift:
-                    self.gift.available_count = max(self.gift.available_count - 1, 0)
+                    self.gift.available_count = max(0, self.gift.available_count - 1)
                     self.gift.save()
 
                 # Increment new gift
                 if old_obj.gift:
-                    old_obj.gift.available_count = max(old_obj.gift.available_count + 1, 0)
+                    old_obj.gift.available_count = max(0, old_obj.gift.available_count + 1)
                     old_obj.gift.save()
 
         # Save price details to snapshot