diff --git a/prod/clean_arch/adapters/hazelcast_feed.py b/prod/clean_arch/adapters/hazelcast_feed.py
index 2803ab0..05e8db0 100644
--- a/prod/clean_arch/adapters/hazelcast_feed.py
+++ b/prod/clean_arch/adapters/hazelcast_feed.py
@@ -126,7 +126,13 @@ class HazelcastDataFeed(DataFeedPort):
 
             # Prefer an explicit vel_div if present; otherwise compute it from
             # 50 vs 750 velocity tracking on the single-result schema.
-            vel_div = scan.get('vel_div')
+            # NOTE: normalize_ng7_scan() hoists vel_div to the top-level data
+            # dict, but scan == result (inner sub-dict) which does NOT have it.
+            # Check the top-level data first, then the scan sub-dict, then
+            # recompute from multi_window_results as a last resort.
+            vel_div = data.get('vel_div') if isinstance(data, dict) else None
+            if vel_div is None:
+                vel_div = scan.get('vel_div')
             if vel_div is None:
                 multi = scan.get('multi_window_results') or {}
                 if isinstance(multi, dict):