diff --git a/grammars/tree-sitter-json.cson b/grammars/tree-sitter-json.cson
index 7381c84..2518349 100644
--- a/grammars/tree-sitter-json.cson
+++ b/grammars/tree-sitter-json.cson
@@ -74,3 +74,5 @@ scopes:
   '"["': 'punctuation.definition.array.begin'
   '"]"': 'punctuation.definition.array.end'
   '"\\""': 'punctuation.definition.string.json'
+
+  'ERROR': 'invalid.illegal'