diff --git a/asterix-runtime/src/main/resources/adm.grammar b/asterix-runtime/src/main/resources/adm.grammar
index 80e2cd4..06614d0 100644
--- a/asterix-runtime/src/main/resources/adm.grammar
+++ b/asterix-runtime/src/main/resources/adm.grammar
@@ -45,7 +45,7 @@
 START_ORDERED_LIST   = char([)
 END_ORDERED_LIST     = char(])
 START_UNORDERED_LIST = string({{)
-END_UNORDERED_LIST   = string(}})
+# END_UNORDERED_LIST  = }} is recognized as a double END_RECORD token
 
 STRING_LITERAL       = char("), anythingUntil(")