diff --git a/completion/services.py b/completion/services.py
index b5fbd7d..3effbd7 100644
--- a/completion/services.py
+++ b/completion/services.py
@@ -117,13 +117,14 @@ def vertical_is_complete(self, item):
         if not self.completion_tracking_enabled():
             return None
 
-        optional_vertical = getattr(item, "optional_content", False)
+        optional_vertical = getattr(item, "optional_completion", False)
 
         # this is temporary local logic and will be removed when the whole course tree is included in completion
         child_locations = [
             child.scope_ids.usage_id for child in self.get_completable_children(item)
-            # for non-optional verticals, only include non-optional children
-            if optional_vertical or not getattr(child, "optional_content", False)
+            # if vertical is optional, include all children
+            # else only include non-optional children
+            if optional_vertical or not getattr(child, "optional_completion", False)
         ]
         completions = self.get_completions(child_locations)
         for child_location in child_locations: