diff --git a/src/structs/ContentType.js b/src/structs/ContentType.js
index c6958941..9c3d8b2c 100644
--- a/src/structs/ContentType.js
+++ b/src/structs/ContentType.js
@@ -26,7 +26,8 @@ export const typeRefs = [
   readYXmlElement,
   readYXmlFragment,
   readYXmlHook,
-  readYXmlText
+  readYXmlText,
+  readYWeakLink
 ]
 
 export const YArrayRefID = 0