diff --git a/lib/galaxy/webapps/galaxy/api/visualizations.py b/lib/galaxy/webapps/galaxy/api/visualizations.py
index 6fdba09f3358..8dfeda25bfce 100644
--- a/lib/galaxy/webapps/galaxy/api/visualizations.py
+++ b/lib/galaxy/webapps/galaxy/api/visualizations.py
@@ -24,7 +24,7 @@
 from galaxy.managers.context import ProvidesUserContext
 from galaxy.model.base import transaction
 from galaxy.model.item_attrs import UsesAnnotations
-from galaxy.schema.fields import DecodedDatabaseIdField
+from galaxy.schema.fields import EncodedDatabaseIdField, DecodedDatabaseIdField
 from galaxy.schema.schema import (
     SetSlugPayload,
     ShareWithPayload,
@@ -124,7 +124,7 @@ async def index(
         deleted: bool = DeletedQueryParam,
         limit: Optional[int] = LimitQueryParam,
         offset: Optional[int] = OffsetQueryParam,
-        user_id: Optional[DecodedDatabaseIdField] = UserIdQueryParam,
+        user_id: Optional[EncodedDatabaseIdField] = UserIdQueryParam,
         show_own: bool = ShowOwnQueryParam,
         show_published: bool = ShowPublishedQueryParam,
         show_shared: bool = ShowSharedQueryParam,