diff --git a/CTFd/api/v1/hints.py b/CTFd/api/v1/hints.py
index 10d39f91..0ee60fa3 100644
--- a/CTFd/api/v1/hints.py
+++ b/CTFd/api/v1/hints.py
@@ -125,7 +125,14 @@ class Hint(Resource):
 
             # Get the IDs of all hints that the user has unlocked
             all_unlocks = HintUnlocks.query.filter_by(account_id=user.account_id).all()
-            unlock_ids = {unlock.id for unlock in all_unlocks}
+            unlock_ids = {unlock.target for unlock in all_unlocks}
+
+            # Get the IDs of all free hints
+            free_hints = Hints.query.filter_by(cost=0).all()
+            free_ids = {h.id for h in free_hints}
+
+            # Add free hints to unlocked IDs
+            unlock_ids.update(free_ids)
 
             # Filter out hint IDs that don't exist
             all_hint_ids = {h.id for h in Hints.query.with_entities(Hints.id).all()}