diff --git a/website/server/models/message.js b/website/server/models/message.js
index 6d7eb8b8d3..93db62a1f9 100644
--- a/website/server/models/message.js
+++ b/website/server/models/message.js
@@ -7,7 +7,7 @@ const defaultSchema = () => ({
   id: String,
   timestamp: Date,
   text: String,
-  info: {type: mongoose.Schema.Types.Mixed},
+  info: {$type: mongoose.Schema.Types.Mixed},
 
   // sender properties
   user: String, // profile name (unfortunately)