diff --git a/src/parser.ts b/src/parser.ts
index 4886cae..9fb951f 100644
--- a/src/parser.ts
+++ b/src/parser.ts
@@ -10,6 +10,7 @@ export type ParserType =
   | 'array-object'
   | 'serializable-class'
   | 'notserializable-class'
+  | 'recursion'
 
 const PARSER_TYPES: Record<string, ParserType> = {
   N: 'null',
@@ -20,6 +21,8 @@ const PARSER_TYPES: Record<string, ParserType> = {
   a: 'array-object',
   C: 'serializable-class',
   O: 'notserializable-class',
+  r: 'recursion',
+  R: 'recursion'
 }
 
 export default class Parser {
diff --git a/src/unserialize.ts b/src/unserialize.ts
index ca7025d..e4f29e8 100644
--- a/src/unserialize.ts
+++ b/src/unserialize.ts
@@ -98,6 +98,10 @@ function unserializeItem(parser: Parser, scope: Record<string, any>, options: Op
     }
     return result
   }
+  if (type == 'recursion') {
+    const value = parser.readUntil(';')
+    return `*RECURSION* reference #${value}`;
+  }
   throw new Error(`Invalid type '${type}' encounterd while unserializing`)
 }
 
diff --git a/test/unserialize-test.ts b/test/unserialize-test.ts
index a7fff95..241e9ac 100644
Binary files a/test/unserialize-test.ts and b/test/unserialize-test.ts differ