diff --git a/data/event-schemas/schema/m.room.pinned_events.yaml b/data/event-schemas/schema/m.room.pinned_events.yaml
index 4e5ea1a9..8f6eff65 100644
--- a/data/event-schemas/schema/m.room.pinned_events.yaml
+++ b/data/event-schemas/schema/m.room.pinned_events.yaml
@@ -12,7 +12,7 @@ properties:
         items:
           type: string
           format: mx-event-id
-          pattern: "^$"
+          pattern: "^\\$"
         type: array
     required:
       - pinned